Add temporary workaround to scheduler
Add temporary workaround to scheduler

Addon of required extra spec 'driver_handles_share_servers' to share types
requires simultanious change of client and server side. So, add
temporary workaround for scheduler to ignore mentioned spec and unblock gates,
until server and client side have all changes done.

This commit should be reverted right after sync is completed.

Change-Id: I72228c0f610b43573e0aea661d80e5ae4a289e46

vponomaryov/manila,bswartz/manila,jcsp/manila,openstack/manila,scality/manila,redhat-openstack/manila,weiting-chen/manila,sajuptpm/manila,NetApp/manila,jcsp/manila,vponomaryov/manila,scality/manila,bswartz/manila,NetApp/manila,weiting-chen/manila,openstack/manila,redhat-openstack/manila,sajuptpm/manila