Updated openstack/openstack
Project: openstack/oslo-incubator  d1f0f752bd60dc6ad25583d7536af6712fd4f548

Delete graduated db files

Per the new process, we will not be keeping graduated files around
on the master branch of incubator.

Closes-Bug: #1371734
Change-Id: I6471c9f6708403ce5e07332a0ce07b94a18c4214