EMC VMAX Driver Juno Update

This driver is an enhancement from the EMC SMI-S driver.
In Juno, VNX support will be removed from this driver.
Moving forward, this driver will support VMAX only.

The following features are added for VMAX:

* Extend volume
* Create volume from snapshot
* Dynamically creating masking views, storage groups,
  and initiator groups
* Striped volumes
* FAST policies

Tempest test results from CI system:
  https://bugs.launchpad.net/cinder/+bug/1337840

Change-Id: I01aaf1041d32351a8dc12c509f387e2d120074a3
Implements: blueprint emc-vmax-driver-juno-update
Merge "EMC VMAX Driver Juno Update"