Add EMC SMI-S FC Driver in Cinder

Add EMC SMI-S FC Driver in Cinder

Add an EMC SMI-S FC Driver in Cinder. It supports all required
driver features.
Also made enhancements to the existing SMI-S iSCSI Driver
(performance enhancement, multiple pool support and thick/thin
provisioning, extend volume).
emc_smis_common.py is the common code used by both iSCSI driver
(emc_smis_iscsi.py) and FC driver (emc_smis_fc.py).

Implements blueprint emc-fibre-channel-volume-driver

Change-Id: Idace398ef60863811911511bcbbfcecb3bf58270