Fixed up to use oslo.config and removed call to deleted method

Openstack moved to use the oslo.config library instead of their
own. Updates our configuration usage to also use the oslo.config

The db.instance_get_all_by_project(...) method has been removed
and our tests can no longer call it. Updated to call the
db.instance_get_all(...).

Updated vmsconn to no longer use nova.flags but the olso.cfg

Updated some unittests to ensure they work against the latest
grizzly code.

Change-Id: Ied522cce21e2717c70b2e53155bb4132b3288642