Update tests to check Exception
Fix bug. No need to dump headers in python-requests
Fix bug. create_database returns 201.
Fix bug. delete_database returns 201.
Fix bug. delete_database returns 204 not 201
Chanage return value of get_database_users
Udpate to handle administering requests
Update testcases (use 201 or 204)
Declare methods (not implemented).
Implement query method