new fixture for user creation
change test code to use new user fixture
Fix bug in getting local_ip when metadata ip ping fails
remove user creation code from project fixture
1.add new step to create user 2. update topology to have user/pwd for all non-admin tenant 3.Make admin as member of non-admin tenant for non-admin teannt
change tests according to new user fixture
Merge pull request #433 from shettyp/test_parallelism

User fixture changes