e397415132
* ClientManager and ProjectsClient class were moved to clients.py * tests related to ClientManager class were moved to test_clients.py * Credentials and auth_provider were decoupled from ClientManager and moved to credentials.py into a Credentials class - credentials are now accessible from everywhere and can be reused. Change-Id: I7251d6353a91f4bbd7b9b7839ad36bb946b660c8