Change I01b22593724616bc0a7793c509ecabf095d6927d made the
live_migrate() method in the ServerManager conditional on the
API version requested. This broke the host-evacuate-live
command which is calling ServerManager.live_migrate() directly
with one too many arguments for the v2.25 version of the method.
This updates the host-evacuate-live shell to behave like the
live-migration method and be aware of the API version when
calling the live_migrate() method.
Related to blueprint making-live-migration-api-friendly
Change-Id: I4dbeb6ebe03f03799b706be2d787d21484b5c664
Closes-Bug: #1561938