Add Fujitsu ETERNUS DX support

Add Fujitsu ETERNUS DX support

 This driver had them correspond to FUJITSU ETERNUS DX.
 This driver supports ETERNUS DX S2 and the S3 series.

 The driver runs volume operations by communicating with the backend
 FUJITSU storage. It uses a CIM client in Python called PyWBEM to perform
 CIM operations over HTTP.

  Support protocols
  -Fibre Channel
  -iSCSI

  Support functions
  -create/delete volume
  -create/delete snapshot
  -attach/detach volume
  -list snapshots
  -create volume from snapshot
  -create volume from image
  -create volume from volume
  -create image from volume
  -extend volume
  -volume migration(host assisted)

driver-cert result
   fc : https://bugs.launchpad.net/cinder/+bug/1359467
   iscsi : https://bugs.launchpad.net/cinder/+bug/1359569

Change-Id: I7fe26dafae2f2db9130e020a34af73d0eb7ac719
Implements: blueprint fujitsu-dx-volume-driver