* Update efficacy indicators and specs.
Because audit can not know actual number of instances migrated in
previous audits, this patch updates LiveInstanceMigrateCount
means the number of instances should be live migrated in each
audit. live_instance_migrate_ratio is also updated to
PlannedLiveInstanceMigrateCount / LiveInstanceMigrateCount.
Cold migration, volume migration, and volume update were also
updated as the same way.
* Update how to prioritize instances and volumes.
The strategy chooses instances in descending order of one of the
list. To choosing volumes is also updated as the same manner.
* Remove changing migration parallel number by network workload.
The number of actions to be run in parallel per node or pool is
given by the input parameter and not vary from now on.
Change-Id: I740e13ec235d80b55f38582906132a01b90387a6
f2d2bd0bc0