PYTHON-1725 Fix TestThreadsAuth.test_auto_auth_login
PYTHON-1725 Fix TestThreadsAuth.test_auto_auth_login

Create the database upfront to avoid test failures on sharded clusters.

mongodb/mongo-python-driver,mongodb/mongo-python-driver,ShaneHarvey/mongo-python-driver,ShaneHarvey/mongo-python-driver,ShaneHarvey/mongo-python-driver,mongodb/mongo-python-driver