Created attachment 624604 [details]
The cartridge select page after add mysql.

Description of problem:
After I embed mysql to my apps, I cannot add mongodb and postgresql anymore. But, I found that mongodb still listed in the cartridge select list , while the postgresql listed in the conflict list. 
I am not sure if the mongodb should be moved to the conflict list, So I put this bug's sevirity as low.

Version-Release number of selected component (if applicable):
devenv_2303

How reproducible:
always

Steps to Reproduce:
1.Create an application.
2.Add mysql to the app.
3.Check the cartridge select page.
4.Try to add mongodb to the app.
  
Actual results:
On step 3, the mongodb listed in the cartridge select list.
On step 4, the mongodb cannot be embed successfully.

Expected results:
On step 3, the mongdb should list in the  conflict cartridge list as the postgresql do.

Additional info: