Fixes issues with raising mysql file limit

Fixes issues with raising mysql file limit

Changes Include:
 - Adds spec testing
 - Only raise limits if nonha.  puppet-systemd will restart the mariadb
   service which breaks ha deployments.  Hence we only want to do this
   in noha.
 - Minor fix to hiera value refrenced not as parameter to mysql.pp

Partial-Bug: #1648181
Related-Bug: #1524809

Co-Authored By: Feng Pan <fpan@redhat.com>

Change-Id: Id063bf4b4ac229181b01f40965811cb8ac4230d5
Signed-off-by: Tim Rozet <trozet@redhat.com>
Signed-off-by: Feng Pan <fpan@redhat.com>