LB: Separate out the validation tests
LB: Separate out the validation tests

Part of blueprint decouple-nested
Change-Id: I52d7b1123fed75f2f9bcd7a66ee7a104fc9cb1b2

maestro-hybrid-cloud/heat,rdo-management/heat,steveb/heat,pshchelo/heat,dims/heat,cryptickp/heat,pratikmallya/heat,jasondunsmore/heat,rh-s/heat,rdo-management/heat,srznew/heat,noironetworks/heat,takeshineshiro/heat,takeshineshiro/heat,gonzolino/heat,steveb/heat,openstack/heat,pratikmallya/heat,dragorosson/heat,cwolferh/heat-scratch,pshchelo/heat,srznew/heat,rh-s/heat,cwolferh/heat-scratch,dragorosson/heat,jasondunsmore/heat,noironetworks/heat,maestro-hybrid-cloud/heat,miguelgrinberg/heat,openstack/heat,dims/heat,miguelgrinberg/heat,gonzolino/heat,cryptickp/heat