BFV Migration tests for V1 and V2

* Added Migration Admin API tests for Boot from volume
* Added check for compute host comparison before and after migrate
* Fixing issues after review - adding named parameters
* Moved change in the test to admin migrate and separate V1 and V2

Change-Id: Ibeb9920645e81145f27957ac0c3da63753225b14
Merge "BFV Migration tests for V1 and V2"