Fixes:
  -CIM_HostedResourcePool is needed in cimv2 to register Virt_HostedResourcePool
   as a cross-namespace provider

  -Implementation specific VirtualSystemSnapshotService should be a subclass of
    CIM_VirtualSystemSnapshotService, not Virt_VirtualSystemSnapshotService

  -CIM_VirtualSystemMigrationSettingData.mof and
   CIM_VirtualSystemMigrationService.mof are needed in interop to properly
   register ECTP asa cross-namespace provider

Signed-off-by: Kaitlin Rupert <karupert@us.ibm.com>