append support for vmdk-volumes in cinder

Allow puppet make cinder.conf with vmware parameters
partially implements: blueprint vcenter-hv-full-scale-support

Change-Id: I64d535d1fb3cea5235f6145c91ac4353d34f7f9b
fix formatting in cinder.pp

Change-Id: I36209454549578032752b30f2dc8867ff60ad3da