Update create_volume API to use versionedobjects

Update create_volume API to use versionedobjects

The following patch updates create_volume API to use
volume versionedobjects.  Changes were made to be
backwards compatible with older RPC clients.  It
only includes changes to the core cinder code.
Changes in the drivers are left to each driver
maintainer to update.

Note that this patch DOES NOT try to use
object dot notation everywhere, since it would
increase the size of the patch.  Instead, it
will be done in subsequent patches.

Co-Authored-By: Michal Dulko <michal.dulko@intel.com>
Change-Id: Ic1b0f09132f8fc500b29650abbd57f18ea8bd9dd
Partial-Implements: blueprint cinder-objects

Change-Id: Ief9c63e8bddb2b40bdef4465b9099cff33d7c3bc