FIPS does not allow md5, some systems like RHEL needs to have FIPS
compliance, in order to execute some routines like when try to
use keystone-manage. As a general rule, we should avoid using md5
if we can and move over to SHA wherever possible.
Change-Id: Icaeb3305c788db2913fe99792ea6311d218b3410
Closes-Bug: #1767024