Previously only the DHSS=True mode was documented
in post install steps. The assumption that the generic driver
was being configured existed in other places as well.
* add DHSS=False documentation as necessary with the
LVM driver.
* correct assumptions in other places to clarify usage
of appropriate share driver modes.
Change-Id: Ic1356453e510e8f360269fb45a41379329ce68c2
Closes-Bug: #1616257
