Added LVM configuration to cinder install

Added instructions to add volume_list filter to /etc/lvm/lvm.conf to prevent volumes from entering "Error_Deleting" as specified in bug #1090595. Without the volume filter, LVM will activate logical volumes created in virtual machines, which can can cinder volumes from being deleted.

Change-Id: I40d12bd1772acc2a2b0e6efab36ce3be4c4f28d6