Updated openstack/openstack
Project: openstack/cinder  8fca3a85f3198f52c05cd9f373b72130ab012271
null
Remove unused task from manager create_volume flow

ExtractSchedulerSpecTask hasn't been ever used in the
create_volume flow, so it should be deleted.

Change-Id: Ia841e224bc253c68ed21520951016a1a90634faf