Description of problem:
The users synchronization mechanism should be improved.
1. It should be invoked not just by the periodic job which is run once an hour, but also when user is added, or when user logs in.
2. Login and AddUser (in case of inactive user) should try to re-activate an inactive user.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
*** This bug has been marked as a duplicate of bug 1120720 ***