Register used CONF entries in cinder.api.common.py
Register used CONF entries in cinder.api.common.py

After change: I2114d5fc45f5299c3b2011270034a3370e0ec388 we
were no longer registering defaults for cinder.api.common.py settings.

The result is that you're unable to run individual unit tests like
cinder.tests.api.test_volume_metadata.py.

Register the needed CONF options and we're all set again.

Fixes bug: 1194315

Change-Id: I6df6c5ec5687c8156a9f3794cc7f04d8d28065d9

NetApp/cinder,julianwang/cinder,Datera/cinder,redhat-openstack/cinder,leilihh/cinder,spring-week-topos/cinder-week,julianwang/cinder,petrutlucian94/cinder,tlakshman26/cinder-new-branch,mahak/cinder,rakeshmi/cinder,phenoxim/cinder,Thingee/cinder,NetApp/cinder,rakeshmi/cinder,mahak/cinder,nikesh-mahalka/cinder,inkerra/cinder,nexusriot/cinder,sasukeh/cinder,duhzecca/cinder,ntt-sic/cinder,alex8866/cinder,tlakshman26/cinder-https-changes,manojhirway/ExistingImagesOnNFS,potsmaster/cinder,apporc/cinder,Paul-Ezell/cinder-1,eharney/cinder,Accelerite/cinder,scottdangelo/RemoveVolumeMangerLocks,eharney/cinder,Akrog/cinder,maelnor/cinder,abusse/cinder,manojhirway/ExistingImagesOnNFS,scality/cinder,duhzecca/cinder,Hybrid-Cloud/cinder,petrutlucian94/cinder,blueboxgroup/cinder,redhat-openstack/cinder,Paul-Ezell/cinder-1,winndows/cinder,hguemar/cinder,hguemar/cinder,nexusriot/cinder,Hybrid-Cloud/cinder,tlakshman26/cinder-https-changes,cloudbase/cinder,Datera/cinder,NeCTAR-RC/cinder,saeki-masaki/cinder,cloudbase/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,scottdangelo/RemoveVolumeMangerLocks,spring-week-topos/cinder-week,abusse/cinder,nikesh-mahalka/cinder,Nexenta/cinder,cloudbau/cinder,Thingee/cinder,scality/cinder,JioCloud/cinder,j-griffith/cinder,rickerc/cinder_audit,NeCTAR-RC/cinder,alex8866/cinder,github-borat/cinder,potsmaster/cinder,phenoxim/cinder,bswartz/cinder,CloudServer/cinder,takeshineshiro/cinder,leilihh/cinder,dims/cinder,cloudbau/cinder,apporc/cinder,ntt-sic/cinder,dims/cinder,CloudServer/cinder,github-borat/cinder,tlakshman26/cinder-new-branch,JioCloud/cinder,rickerc/cinder_audit,winndows/cinder,sasukeh/cinder,Akrog/cinder,takeshineshiro/cinder,openstack/cinder,j-griffith/cinder,Thingee/cinder,saeki-masaki/cinder,bswartz/cinder,tlakshman26/cinder-bug-fix-volume-conversion-full,maelnor/cinder,inkerra/cinder,blueboxgroup/cinder,ge0rgi/cinder,Nexenta/cinder,Accelerite/cinder,openstack/cinder