Project wizard: error text is too verbose, shows json

steps to reproduce:

1. ASSERT: make sure that you have a project in a v3 openshift connection
2. EXEC: launch app wizard and hit "Manage Projects"
3. ASSERT: project wizard pops up listing your project(s)
4. EXEC: hit "New..." and provide a name that you already used

Result:
An error pops up as expected, since the project couldnt be created. But the error message shows json