Updated openstack/openstack
Project: openstack/keystone  2fea9c560a6d8c4fc5522795624ac9a84bd40450
null
Don't re-raise instance

There were a couple of places where the code would re-raise an
exception with `raise inst`. This would lose the original
backtrace.

Change-Id: I437039fe520bd88b556af9ed2ee4a14bfe120498