Update .coveragerc after the removal of openstack directory
Update .coveragerc after the removal of openstack directory

The openstack directory was used to keep codes from oslo-incubator,
we have retired oslo-incubator,so don't use this directory any more.

Change-Id: Ieb90fb2f1be32ca783aef66d5c6e73f5aa3634cc

ramineni/my_congress,ramineni/my_congress,openstack/congress,openstack/congress,ramineni/my_congress,ramineni/my_congress