Updated requiments file.
Change variable name to clarify what they do.
implemented a unique user with a strong password and a valid mail for all test.
TYPO
Created default user data for testing in test_connection_manager
Fixed with new implementation of test_register_user.
Created test_register_user_with_weat_password.
Created test_register_user_with_already_existent_user into test_connection_manager.
Refactored the response object in registration of new user into connection_manager and client_cmdmanager.
Now we don't send useless need_improvements key if not necessary.
Changed client_cmdmanager implementation to accept the new response object.