Bump oslo.rootwrap to 1.3.0.0a1 for Cinder

Cinder already requires oslo.rootwrap 1.3.0 filters so we need to
bump requirements accordingly.

This will fix a variety of rootwrap warnings that can occur when using
the new cgroups features.

Change-Id: Ia72444d054a35c3dbb34c24dbefe8f05cdebbd33
Closes-bug: #1340877
Introduce iSCSI driver for Pure Storage FlashArray

This patch introduces an iSCSI driver for Pure Storage FlashArray to Cinder.
It impliments all required features.

Certification test results:
    https://bugs.launchpad.net/cinder/+bug/1347109

Change-Id: I25f465b4abfc19d9b2717ec095c65201e76beab9
Impliements: blueprint pure-iscsi-volume-driver
Merge "Bump oslo.rootwrap to 1.3.0.0a1 for Cinder"
Merge "Introduce iSCSI driver for Pure Storage FlashArray"