Remove the 'migrate' option from cinder-manage
Remove the 'migrate' option from cinder-manage

The 'migrate' option was only appropriate for use migrating
databases for volumes from Nova-Folsom-->Cinder-Folsom.  The
code hasn't been tested since.

Given the above facts, this commit removes the migrate code from
cinder-manage.  The man page for cinder-manage was already
updated to remove the option in a previous commit.

(fixes bug #1187134)

Change-Id: I7bf378cd4b0dd4f6d1bdf475b826a59a31112638

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