Don't create user in AuthManagerTest dataProvider

Don't create user in AuthManagerTest dataProvider

Creating users involves database access and the test
database isn't fully setup yet when data providers run.

In this particular test / data provider, all that is needed
is the user name so we can just set that w/o creating
the user in the data provider. The user gets created during
the test. (after the test database is setup)

also $id set in $id = $user->getId() was unused and was the
specific code that involved making a database connection.

Change-Id: I1685dfdd6cfc60cd2c59a4d9de95bcbbaba5e153