Description of problem:
"ose-upgrade begin" command throw traceback when doing upgrade testing against RHN subscription

Version-Release number of selected component (if applicable):
OSE-1.2 RHN stage

How reproducible:
Always

Steps to Reproduce:
1.Register system to RHN Live, setup openshift environment.
2.Edit /etc/sysconfig/rhn/up2date to use stage url according to https://docspace.corp.redhat.com/docs/DOC-64963
3.Register system to RHN Stage to get latest ose-1.2 binaries.
4.Subscribe rhel-x86_64-server-6-osop-1-infrastructure channel
5.Install openshift-enterprise-release
6.Run "ose-upgrade begin"

Actual results:
[root@broker ~]# ose-upgrade begin
INFO: Setting host step 'begin' status to UPGRADING
INFO: Starting upgrade number 1 to version 1.2.
INFO: loading list of installed packages
INFO: RHN subscription detected.
In order to reconfigure your RHN channels, we will need credentials.
What is your RHN username? qa
What is your RHN password (will not show)? 
INFO: Running upgrade scripts in /usr/lib/ruby/site_ruby/1.8/ose-upgrade/host/upgrades/1/rhn
INFO: skipping /usr/lib/ruby/site_ruby/1.8/ose-upgrade/host/upgrades/1/rhn/01-new-channels -- already ran successfully
INFO: running /usr/lib/ruby/site_ruby/1.8/ose-upgrade/host/upgrades/1/rhn/02-configure-yum-priorities
ERROR: run_script
/usr/lib/ruby/site_ruby/1.8/ose-upgrade/host/upgrades/1/rhn/02-configure-yum-priorities had errors:
--BEGIN OUTPUT--
+ yum install -y yum-plugin-priorities
Loaded plugins: priorities, product-id, rhnplugin, security, subscription-
              : manager
This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.
This system is receiving updates from RHN Classic or RHN Satellite.
Setting up Install Process
Nothing to do
+ for channel in rhel-x86_64-server-6-ose-1.2-rhc rhel-x86_64-server-6-ose-1.2-infrastructure rhel-x86_64-server-6-ose-1.2-node rhel-x86_64-server-6-ose-1.2-jbosseap
+ yum-config-manager --setopt=rhel-x86_64-server-6-ose-1.2-rhc.priority=1 rhel-x86_64-server-6-ose-1.2-rhc --save
Loaded plugins: priorities, product-id, rhnplugin
This system is receiving updates from RHN Classic or RHN Satellite.
+ for channel in rhel-x86_64-server-6-ose-1.2-rhc rhel-x86_64-server-6-ose-1.2-infrastructure rhel-x86_64-server-6-ose-1.2-node rhel-x86_64-server-6-ose-1.2-jbosseap
+ yum-config-manager --setopt=rhel-x86_64-server-6-ose-1.2-infrastructure.priority=1 rhel-x86_64-server-6-ose-1.2-infrastructure --save
Loaded plugins: priorities, product-id, rhnplugin
This system is receiving updates from RHN Classic or RHN Satellite.
============== repo: rhel-x86_64-server-6-ose-1.2-infrastructure ===============
[rhel-x86_64-server-6-ose-1.2-infrastructure]
bandwidth = 0
base_persistdir = /var/lib/yum/repos/x86_64/6Server
baseurl = https://xmlrpc.rhn.errata.stage.redhat.com/XMLRPC/GET-REQ/rhel-x86_64-server-6-ose-1.2-infrastructure
cache = 0
cachedir = /var/cache/yum/x86_64/6Server/rhel-x86_64-server-6-ose-1.2-infrastructure
cost = 1000
enabled = True
enablegroups = True
exclude = 
failovermethod = priority
gpgcadir = /var/lib/yum/repos/x86_64/6Server/rhel-x86_64-server-6-ose-1.2-infrastructure/gpgcadir
gpgcakey = 
gpgcheck = True
gpgdir = /var/lib/yum/repos/x86_64/6Server/rhel-x86_64-server-6-ose-1.2-infrastructure/gpgdir
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
hdrdir = /var/cache/yum/x86_64/6Server/rhel-x86_64-server-6-ose-1.2-infrastructure/headers
http_caching = True
includepkgs = 
keepalive = 0
label = rhel-x86_64-server-6-ose-1.2-infrastructure
mdpolicy = group:primary
mediaid = 
metadata_expire = 21600
metalink = 
mirrorlist = 
mirrorlist_expire = 86400
name = Red Hat OpenShift Enterprise 1.2 Infrastructure - x86_64
password = 
persistdir = /var/lib/yum/repos/x86_64/6Server/rhel-x86_64-server-6-ose-1.2-infrastructure
pkgdir = /var/cache/yum/x86_64/6Server/rhel-x86_64-server-6-ose-1.2-infrastructure/packages
priority = 99
proxy = 
proxy_dict = 
proxy_password = 
proxy_username = 
repo_gpgcheck = False
retries = 1
rhn_needed_headers = X-RHN-Server-Id,
   X-RHN-Auth-User-Id,
   X-RHN-Auth,
   X-RHN-Auth-Server-Time,
   X-RHN-Auth-Expire-Offset
skip_if_unavailable = False
ssl_check_cert_permissions = True
sslcacert = /usr/share/rhn/RHNS-CA-CERT
sslclientcert = 
sslclientkey = 
sslverify = True
throttle = 0
timeout = 60.0
up2date_cfg = <up2date_client.config.Config instance at 0x23a3128>
username = 

+ for channel in rhel-x86_64-server-6-ose-1.2-rhc rhel-x86_64-server-6-ose-1.2-infrastructure rhel-x86_64-server-6-ose-1.2-node rhel-x86_64-server-6-ose-1.2-jbosseap
+ yum-config-manager --setopt=rhel-x86_64-server-6-ose-1.2-node.priority=1 rhel-x86_64-server-6-ose-1.2-node --save
Loaded plugins: priorities, product-id, rhnplugin
This system is receiving updates from RHN Classic or RHN Satellite.
+ for channel in rhel-x86_64-server-6-ose-1.2-rhc rhel-x86_64-server-6-ose-1.2-infrastructure rhel-x86_64-server-6-ose-1.2-node rhel-x86_64-server-6-ose-1.2-jbosseap
+ yum-config-manager --setopt=rhel-x86_64-server-6-ose-1.2-jbosseap.priority=1 rhel-x86_64-server-6-ose-1.2-jbosseap --save
Loaded plugins: priorities, product-id, rhnplugin
This system is receiving updates from RHN Classic or RHN Satellite.
+ for channel in rhel-x86_64-server-6
+ yum-config-manager --setopt=rhel-x86_64-server-6.priority=2 rhel-x86_64-server-6 --save
Loaded plugins: priorities, product-id, rhnplugin
This system is receiving updates from RHN Classic or RHN Satellite.
========================== repo: rhel-x86_64-server-6 ==========================
[rhel-x86_64-server-6]
bandwidth = 0
base_persistdir = /var/lib/yum/repos/x86_64/6Server
baseurl = https://xmlrpc.rhn.errata.stage.redhat.com/XMLRPC/GET-REQ/rhel-x86_64-server-6
cache = 0
cachedir = /var/cache/yum/x86_64/6Server/rhel-x86_64-server-6
cost = 1000
enabled = True
enablegroups = True
exclude = 
failovermethod = priority
gpgcadir = /var/lib/yum/repos/x86_64/6Server/rhel-x86_64-server-6/gpgcadir
gpgcakey = 
gpgcheck = True
gpgdir = /var/lib/yum/repos/x86_64/6Server/rhel-x86_64-server-6/gpgdir
gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
hdrdir = /var/cache/yum/x86_64/6Server/rhel-x86_64-server-6/headers
http_caching = True
includepkgs = 
keepalive = 0
label = rhel-x86_64-server-6
mdpolicy = group:primary
mediaid = 
metadata_expire = 21600
metalink = 
mirrorlist = 
mirrorlist_expire = 86400
name = Red Hat Enterprise Linux Server (v. 6 for 64-bit x86_64)
password = 
persistdir = /var/lib/yum/repos/x86_64/6Server/rhel-x86_64-server-6
pkgdir = /var/cache/yum/x86_64/6Server/rhel-x86_64-server-6/packages
priority = 99
proxy = 
proxy_dict = 
proxy_password = 
proxy_username = 
repo_gpgcheck = False
retries = 1
rhn_needed_headers = X-RHN-Server-Id,
   X-RHN-Auth-User-Id,
   X-RHN-Auth,
   X-RHN-Auth-Server-Time,
   X-RHN-Auth-Expire-Offset
skip_if_unavailable = False
ssl_check_cert_permissions = True
sslcacert = /usr/share/rhn/RHNS-CA-CERT
sslclientcert = 
sslclientkey = 
sslverify = True
throttle = 0
timeout = 60.0
up2date_cfg = <up2date_client.config.Config instance at 0x11e70e0>
username = 

Traceback (most recent call last):
  File "/usr/bin/yum-config-manager", line 179, in <module>
    repo.cfg.options, repo.iteritems, repo.optionobj,
AttributeError: 'RhnRepo' object has no attribute 'cfg'
+ exit 1

--END /usr/lib/ruby/site_ruby/1.8/ose-upgrade/host/upgrades/1/rhn/02-configure-yum-priorities OUTPUT--
INFO: Setting host step 'begin' status to FAILED


Expected results:
No any error is seen.

Additional info: