Updated openstack/openstack
Project: openstack-dev/devstack  fa812614d90808923d8271e6e404d70113df3d45

Specialize Zaqar's cleanup function

Instead of having mongodb specific cleanup logic in `cleanup_zaqar`,
specialize it to perform clean ups based on the driver that has been
enabled.

Change-Id: I5807a83443b87b2c8d184e0cd2d5563a649c6273