Make sure unit tests set the correct log levels
Make sure unit tests set the correct log levels

Unit tests appear to not set the expected logging levels so
a number of modules will log excessivly (e.g. ISO8601).

This change ensures the base test classe sets the correct logging
levels (in the same way as the openstack.common.log module).

Change-Id: Ic11b7adee5f27f71094b4ef2b4a635f78f83cba8
Closes-Bug: #1340970

mahak/keystone,blueboxgroup/keystone,ging/keystone,rajalokan/keystone,idjaw/keystone,dims/keystone,maestro-hybrid-cloud/keystone,takeshineshiro/keystone,cernops/keystone,blueboxgroup/keystone,MaheshIBM/keystone,reeshupatel/demo,vivekdhayaal/keystone,mahak/keystone,ging/keystone,reeshupatel/demo,jumpstarter-io/keystone,klmitch/keystone,promptworks/keystone,rajalokan/keystone,rushiagr/keystone,ilay09/keystone,promptworks/keystone,jonnary/keystone,MaheshIBM/keystone,rodrigods/keystone,nuxeh/keystone,jumpstarter-io/keystone,nuxeh/keystone,maestro-hybrid-cloud/keystone,cernops/keystone,rushiagr/keystone,UTSA-ICS/keystone-kerberos,openstack/keystone,rajalokan/keystone,vivekdhayaal/keystone,promptworks/keystone,dstanek/keystone,reeshupatel/demo,UTSA-ICS/keystone-kerberos,openstack/keystone,rodrigods/keystone,takeshineshiro/keystone,jamielennox/keystone,ajayaa/keystone,roopali8/keystone,dstanek/keystone,klmitch/keystone,nuxeh/keystone,idjaw/keystone,himanshu-setia/keystone,ilay09/keystone,rushiagr/keystone,openstack/keystone,dims/keystone,himanshu-setia/keystone,dstanek/keystone,ilay09/keystone,roopali8/keystone,vivekdhayaal/keystone,jonnary/keystone,mahak/keystone,jumpstarter-io/keystone,ajayaa/keystone,jamielennox/keystone