Add volume migration api support
Add volume migration api support

Change-Id: I4bfaa17c75e9bc6803146b63937f21e0f0bd5852
Partially-Implements: blueprint volume-migration

Metaswitch/horizon,openstack/horizon,davidcusatis/horizon,Tesora/tesora-horizon,luhanhan/horizon,philoniare/horizon,anthonydillon/horizon,damien-dg/horizon,pranavtendolkr/horizon,FNST-OpenStack/horizon,anthonydillon/horizon,karthik-suresh/horizon,henaras/horizon,mdavid/horizon,vladryk/horizon,idjaw/horizon,mdavid/horizon,redhat-cip/horizon,dan1/horizon-proto,anthonydillon/horizon,takeshineshiro/horizon,openstack/horizon,BiznetGIO/horizon,watonyweng/horizon,Solinea/horizon,bigswitch/horizon,philoniare/horizon,ChameleonCloud/horizon,Mirantis/mos-horizon,Mirantis/mos-horizon,wolverineav/horizon,wolverineav/horizon,xinwu/horizon,liyitest/rr,bac/horizon,takeshineshiro/horizon,tqtran7/horizon,dan1/horizon-proto,endorphinl/horizon,damien-dg/horizon,Solinea/horizon,Metaswitch/horizon,NeCTAR-RC/horizon,sandvine/horizon,watonyweng/horizon,henaras/horizon,tellesnobrega/horizon,anthonydillon/horizon,kfox1111/horizon,pranavtendolkr/horizon,bigswitch/horizon,damien-dg/horizon,xinwu/horizon,mandeepdhami/horizon,icloudrnd/automation_tools,yeming233/horizon,dan1/horizon-x509,mandeepdhami/horizon,newrocknj/horizon,liyitest/rr,FNST-OpenStack/horizon,eayunstack/horizon,luhanhan/horizon,coreycb/horizon,watonyweng/horizon,philoniare/horizon,coreycb/horizon,yjxtogo/horizon,pranavtendolkr/horizon,takeshineshiro/horizon,bac/horizon,doug-fish/horizon,openstack/horizon,Hodorable/0602,django-leonardo/horizon,endorphinl/horizon,saydulk/horizon,endorphinl/horizon-fork,eayunstack/horizon,Dark-Hacker/horizon,watonyweng/horizon,saydulk/horizon,xinwu/horizon,yjxtogo/horizon,django-leonardo/horizon,icloudrnd/automation_tools,gerrive/horizon,vladryk/horizon,karthik-suresh/horizon,blueboxgroup/horizon,luhanhan/horizon,luhanhan/horizon,philoniare/horizon,tqtran7/horizon,yeming233/horizon,j4/horizon,noironetworks/horizon,noironetworks/horizon,django-leonardo/horizon,RudoCris/horizon,bigswitch/horizon,endorphinl/horizon-fork,Solinea/horizon,tellesnobrega/horizon,davidcusatis/horizon,endorphinl/horizon,saydulk/horizon,wolverineav/horizon,bac/horizon,Tesora/tesora-horizon,yjxtogo/horizon,redhat-cip/horizon,doug-fish/horizon,Tesora/tesora-horizon,vladryk/horizon,FNST-OpenStack/horizon,mandeepdhami/horizon,BiznetGIO/horizon,henaras/horizon,blueboxgroup/horizon,maestro-hybrid-cloud/horizon,newrocknj/horizon,tqtran7/horizon,coreycb/horizon,tqtran7/horizon,liyitest/rr,j4/horizon,endorphinl/horizon,redhat-openstack/horizon,Metaswitch/horizon,bigswitch/horizon,dan1/horizon-x509,blueboxgroup/horizon,j4/horizon,doug-fish/horizon,icloudrnd/automation_tools,django-leonardo/horizon,Hodorable/0602,Dark-Hacker/horizon,kfox1111/horizon,sandvine/horizon,blueboxgroup/horizon,agileblaze/OpenStackTwoFactorAuthentication,Tesora/tesora-horizon,redhat-openstack/horizon,NeCTAR-RC/horizon,doug-fish/horizon,yeming233/horizon,BiznetGIO/horizon,dan1/horizon-x509,idjaw/horizon,redhat-cip/horizon,agileblaze/OpenStackTwoFactorAuthentication,newrocknj/horizon,RudoCris/horizon,newrocknj/horizon,openstack/horizon,gerrive/horizon,redhat-openstack/horizon,ChameleonCloud/horizon,henaras/horizon,BiznetGIO/horizon,Hodorable/0602,gerrive/horizon,gerrive/horizon,Hodorable/0602,Solinea/horizon,agileblaze/OpenStackTwoFactorAuthentication,kfox1111/horizon,liyitest/rr,RudoCris/horizon,mdavid/horizon,Dark-Hacker/horizon,ChameleonCloud/horizon,maestro-hybrid-cloud/horizon,Mirantis/mos-horizon,dan1/horizon-proto,karthik-suresh/horizon,FNST-OpenStack/horizon,mdavid/horizon,yeming233/horizon,idjaw/horizon,dan1/horizon-x509,icloudrnd/automation_tools,endorphinl/horizon-fork,noironetworks/horizon,ChameleonCloud/horizon,idjaw/horizon,Dark-Hacker/horizon,kfox1111/horizon,redhat-cip/horizon,sandvine/horizon,davidcusatis/horizon,agileblaze/OpenStackTwoFactorAuthentication,eayunstack/horizon,NeCTAR-RC/horizon,dan1/horizon-proto,yjxtogo/horizon,mandeepdhami/horizon,NeCTAR-RC/horizon,vladryk/horizon,pranavtendolkr/horizon,sandvine/horizon,takeshineshiro/horizon,j4/horizon,davidcusatis/horizon,maestro-hybrid-cloud/horizon,maestro-hybrid-cloud/horizon,saydulk/horizon,tellesnobrega/horizon,Metaswitch/horizon,RudoCris/horizon,Mirantis/mos-horizon,noironetworks/horizon,redhat-openstack/horizon,endorphinl/horizon-fork,tellesnobrega/horizon,xinwu/horizon,bac/horizon,karthik-suresh/horizon,coreycb/horizon,damien-dg/horizon,wolverineav/horizon