Updated openstack/openstack
Project: openstack/sahara  a75f1fd75b889e2f45e21af8446448fc84195200

Fixed cluster scaling in distributed mode

API has no way to get engine version without RPC call. Replaced
direct method call with RPC call.

Change-Id: I8b6db54c7eb4b58167c8266bc58f180ccd2bbe13
Closes-Bug: #1388164