Description of problem:
If an older client (subscription-manager-1.1.23, for ex) encounters
an entitlement cert with no Order.contract value, the gui throws
an exception and fails to start.

NOTE:  this was an entitlement cert left on the box that was registered
and subscribed with a newer client, then had an older client installed.


[subscription-manager (master %)]$ sudo subscription-manager-gui 
sequence item 0: expected string, NoneType found

< /var/log/rhsm/rhsm.log >
...
2013-06-27 14:15:30,144 [ERROR]  @subscription-manager-gui:146 - sequence item 0: expected string, NoneType found
Traceback (most recent call last):
  File "/usr/sbin/subscription-manager-gui", line 129, in <module>
    main = managergui.MainWindow(auto_launch_registration=options.register)
  File "/usr/share/rhsm/subscription_manager/gui/managergui.py", line 245, in __init__
    prod_dir=self.product_dir)
  File "/usr/share/rhsm/subscription_manager/gui/installedtab.py", line 108, in __init__
    self.update_products()
  File "/usr/share/rhsm/subscription_manager/gui/installedtab.py", line 181, in update_products
    contract = self.rreplace((", ").join(contract_ids), \
TypeError: sequence item 0: expected string, NoneType found


rct cat-cert /etc/pki/entitlement/1187350796435672031.pem
+-------------------------------------------+
        Entitlement Certificate
+-------------------------------------------+

Certificate:
        Path: /etc/pki/entitlement/1187350796435672031.pem
        Version: 3.2
        Serial: 1187350796435672031
        Start Date: 2012-12-31 05:00:00+00:00
        End Date: 2013-12-31 04:59:59+00:00

Subject:
        CN: 8a8d019a3f86ca58013f86d5345a005c

Product:
        ID: 180
        Name: Red Hat Beta
        Version: 
        Arch: x86_64,ppc64,ia64,ppc,s390,x86,s390x
        Tags: 

Product:
        ID: 69
        Name: Red Hat Enterprise Linux Server
        Version: 
        Arch: x86_64,ia64,x86
        Tags: 

Order:
        Name: Red Hat Enterprise Linux Server, Premium (8 sockets) (Up to 4 guests)
        Number: 
        SKU: RH0103708
        Contract: 
        Account: 5206751
        Service Level: Premium
        Service Type: L1-L3
        Quantity: 5
        Quantity Used: 1
        Socket Limit: 8
        RAM Limit: 
        Virt Limit: 
        Virt Only: False
        Subscription: 
        Stacking ID: 
        Warning Period: 0
        Provides Management: False

< ... Lots and Lots of Content info here but ...>




Version-Release number of selected component (if applicable):

[subscription-manager (master %)]$ rpm -q subscription-manager subscription-manager-gui python-rhsm
subscription-manager-1.1.23-1.el6.x86_64
subscription-manager-gui-1.1.23-1.el6.x86_64
python-rhsm-1.1.8-1.el6.x86_64

Expected results:


Additional info: