Do not pass disk_over_commit after Microversion 2.25

disk_over_commit is removed from os-migrateLive in Microversion 2.25,
so do not pass it when calling live_migrate_server.

Ref: https://docs.openstack.org/nova/latest/reference/api-microversion-history.html#maximum-in-mitaka

Implements blueprint: clear-deprecated-api

Change-Id: Ie2c47908bfd2dd9753865f4f6ee58b991f538de8
2 files changed