Description of problem:


Version-Release number of selected component (if applicable):
stage -  sprint 5

How reproducible:
Always

Steps to Reproduce:
1. Make sure an existing app with alias (bar.foo.com) already added 
$ rhc-domain-info -p <password>
<--snip-->
wsgitest
    Framework: python-2.6
     Creation: 2012-01-18T01:46:17-05:00
         UUID: d0ffd65a28344637800d6ce1d7810d62
      Git URL: ssh://d0ffd65a28344637800d6ce1d7810d62.rhcloud.com/~/git/wsgitest.git/
   Public URL: http://wsgitest-jialiu1.stg.rhcloud.com/
      Aliases: bar.foo.com
<--snip-->

2. Create a new app

3. Add some non-existing aliases (bar.xx.com) to this app
$ rhc-ctl-app -a phptest -c add-alias --alias bar.xx.com -p 214214

RESULT:
Success

$ rhc-domain-info -p <password>
Application Info
================
phptest
    Framework: php-5.3
     Creation: 2012-02-17T03:34:22-05:00
         UUID: 6145a5d4c994417c9b036dbc95e66191
      Git URL: ssh://6145a5d4c994417c9b036dbc95e66191.rhcloud.com/~/git/phptest.git/
   Public URL: http://phptest-jialiu.stg.rhcloud.com/
      Aliases: bar.xx.com

 Embedded: 
      None


$ rhc-ctl-app -a phptest -c add-alias --alias bar.xx.com -p <password>
Problem reported from server. Response code was 400.
Re-run with -d for more information.

RESULT:
Alias 'bar.xx.com' already exists for 'phptest'

(NOTE: This error is expected)

4. Add a duplicated alias (bar.foo.com) that is using by other app to the new app
$ rhc-ctl-app -a phptest -c add-alias --alias bar.foo.com -p <password>

RESULT:
Success

$ rhc-domain-info -p <password>
Application Info
================
phptest
    Framework: php-5.3
     Creation: 2012-02-17T03:34:22-05:00
         UUID: 6145a5d4c994417c9b036dbc95e66191
      Git URL: ssh://6145a5d4c994417c9b036dbc95e66191.rhcloud.com/~/git/phptest.git/
   Public URL: http://phptest-jialiu.stg.rhcloud.com/
      Aliases: bar.xx.com

 Embedded: 
      None

NOTE:
Found the "bar.foo.com" is not be seen in the output

  
Actual results:
Alias - "bar.foo.com" that is using be other app is added successfully, but not shown in the output of rhc-domain-info.

Ping these two app, found they are running the same instance:
$ ping phptest-jialiu.stg.rhcloud.com
PING ec2-107-21-77-136.compute-1.amazonaws.com (107.21.77.136) 56(84) bytes of data.
64 bytes from ec2-107-21-77-136.compute-1.amazonaws.com (107.21.77.136): icmp_req=1 ttl=47 time=270 ms


$ ping wsgitest-jialiu1.stg.rhcloud.com
PING ec2-107-21-77-136.compute-1.amazonaws.com (107.21.77.136) 56(84) bytes of data.
64 bytes from ec2-107-21-77-136.compute-1.amazonaws.com (107.21.77.136): icmp_req=1 ttl=47 time=270 ms



Expected results:
An alias using by other app should be allowed to add again on the same instance.

Additional info:
Access web page using this alias, find the first app is being accessed.
$ curl -H "Host: bar.foo.com" ec2-107-21-77-136.compute-1.amazonaws.com |grep title
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  7 16565    7  1192    0     0   1369      0  0:00:12 --:--:--  0:00:12  3947  <title>Welcome to ---wsgi--- OpenShift</title>
100 16565  100 16565    0     0  14438      0  0:00:01  0:00:01 --:--:-- 28609