Bump the oslo-config version to address issues.
Bump the oslo-config version to address issues.

Cinder unit tests weren't running with b3, b4 has some
fixes that put things back on track.

Change-Id: I7f8b7e1ab688790577d5ea3e95b4b20c6e552fae

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