Fixes the provisioning on selected volumes for NetApp 7 mode.

The current direct driver for 7 mode provisions openstack
volume on all NetApp 7 mode volumes mixing openstack volumes
with all non openstack volumes. This fix allows volume selection
by the user to keep openstack volumes separate from non opnestack
block storage entities.

bug 1132834

Change-Id: I77b78ce304e72482724b6ff7c52795c60992243e
NetApp: Fix race condition in 7-mode iSCSI driver with DFM.

A race condition was discovered in the driver while creating
or deleting multiple volumes in a very short interval of time
(can be reproduced by making successive API calls to Cinder).
This fix decorates the methods responsible for race condition
with a synchronized() decorator. The problem was with the
management software: DFM, and in principle, there should not
be two processes trying to modify the DFM dataset object at
the same time. This patch prevents from such a possibility.

Fixes bug 1091480

Change-Id: I11cfc8868171acec356f4140aba52b8078d109df
Fix query filter in volume_get_active_by_window()

Fixes LP bug #1131320

Change-Id: Iec51ecbe49a76e3a5b7374b04f20949c77c52984
Merge "Fixes the provisioning on selected volumes for NetApp 7 mode."
Merge "Fix query filter in volume_get_active_by_window()"
Merge "NetApp: Fix race condition in 7-mode iSCSI driver with DFM."