Expose StandardLogging fixture for use
Expose StandardLogging fixture for use

This will allow any tests to access self.stdlog.logger.output to see
what was logged.

Change-Id: I8855b10d57c067e06eccc887dea9a9e0e57dcb4c

Juniper/nova,mikalstill/nova,rajalokan/nova,klmitch/nova,rahulunair/nova,gooddata/openstack-nova,gooddata/openstack-nova,phenoxim/nova,Juniper/nova,rajalokan/nova,vmturbo/nova,mikalstill/nova,rahulunair/nova,jianghuaw/nova,phenoxim/nova,jianghuaw/nova,vmturbo/nova,gooddata/openstack-nova,vmturbo/nova,openstack/nova,klmitch/nova,mahak/nova,mikalstill/nova,Juniper/nova,klmitch/nova,rahulunair/nova,vmturbo/nova,mahak/nova,gooddata/openstack-nova,jianghuaw/nova,jianghuaw/nova,mahak/nova,klmitch/nova,rajalokan/nova,openstack/nova,rajalokan/nova,openstack/nova,Juniper/nova