Add migration support to Xen RA.
Add migration support to Xen RA.

--HG--
extra : convert_revision : 26d5068a03195c9d8a850b5526b06824dabe8ae6

asp24/resource-agents,stevenraspudic/resource-agents,asp24/resource-agents,asp24/resource-agents,stevenraspudic/resource-agents,stevenraspudic/resource-agents