Description of problem:

After I added mongodb to the application,I tried to add mysql or postgresql cartridge to the same application, but caught error message which says "Only 1 embedded database permitted - application currently has 'mongodb-2.2'", CLI and website will get the same result.

PS, with mysql or postgresql embeded, I can add mongodb successfully.

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

devenv_2295

How reproducible:always


Steps to Reproduce:
1.Go to openshift website and login
2.Create an application and add mongodb cartridge
3.Try to add mysql or postgresql cartridge.
  
Actual results:

Can not add mysql  or postgresql cartridges to the same application with mongodb embeded. 

Expected results:

We should be able to add mysql or postgresql cartridge to the same application with mongodb embeded.

Additional info: