Namespace bugs

Created by: pdf

As of df03275e:

• Namespace selected in dropdown during project creation is ignored, new projects are always created in user's namespace
• Namespace selection via Admin -> Projects -> Edit dropdown does not invoke Gitlab::ProjectMover, resulting in broken projects (namespace updated in DB, but repository not moved on disk).
• Namespaces not displayed in Add User to Projects autocomplete list (though perhaps this is overlooked due to upcoming group permissions? ;-) )