[Xen-API] Migration support in Xen API

[Jim Fehlig <jfehlig@xxxxxxxxxx>]

The DMTF is close to ratifying migration support in the CIM schema. 
Barring any unforeseen issues with the Change Request (CR), migration
modeling will be included in the next release of CIM schema (version
2.16).  All of the details can be found in the CR

http://www.dmtf.org/apps/org/workgroup/cim-core/download.php/31585/CIMCoreCR00925.010.html

I would like to implement this CR in Xen CIM providers and thus need
some support for migration in Xen API.  For those who don't belong to
DMTF member companies and hence cannot access the above link, the
interesting methods are

MigrateVirtualSystemToHost()
Method to move, migrate or relocate a virtual system to a target host
specified by a network name or IP address.

CheckVirtualSystemIsMigratableToHost()
Method to perform a pre-check to determine whether a virtual system is
likely to be successfully migrated to a target host specified by a
network name or IP address.  This method does not guarantee that a
subsequent migration will always succeed, due to dynamic resource
availability.

Other methods exist in the referenced CR, but these can be implemented
on top of the above operations.

Thoughts?

Regards,
Jim

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