Description of problem:
yum-rhn-plugin does not observe the define httpProxy in update configuration file on centos/rhel 5 release (works on rhel 6)


Version-Release number of selected component (if applicable):
1.7 of spacewalk client tools
centos/rhel 5


How reproducible:
every time


Steps to Reproduce:
1. configure a centos/rhel 5 system register/use spacewalk 1.7
2. configure up2date configuration file for use of an httpProxy
3. attempt to run yum update

Actual results:
strace shows that it is attempting to connect to the ip resolving for the serverURL and not use the proxy server


Expected results:
yum update (utilizing yum-rhn-plugin) would use the defined proxy to connect to spacewalk


Additional info:
in the rhnplugin.py file it is passing HTTPS and HTTP to grabber.py in python.  If you modify rhnplugin.py to pass https and http respectfully then everything works.

if you apply the following patch it works for both rhel/centos 5 and rhel/centos 6:


--- rhnplugin.py	2013-08-27 23:12:08.000000000 +0000
+++ rhnplugin.new	2013-08-27 23:12:28.000000000 +0000
@@ -76,9 +76,9 @@
         proxy_url = get_proxy_url(up2date_cfg)
         if proxy_url:
             if up2date_cfg['useNoSSLForPackages']:
-                proxy_dict = {'HTTP' : proxy_url}
+                proxy_dict = {'http' : proxy_url}
             else:
-                proxy_dict = {'HTTPS' : proxy_url}
+                proxy_dict = {'https' : proxy_url}
     except BadProxyConfig:
         rhn_enabled = False
         PROXY_ERROR =  _("There was an error parsing the RHN proxy settings.")