In puppet 4 templates require variables to be
explicitly set in parent class scope.
This patch adds status_password and status_user parameters
to cluster::galera_status class so they can be available
for openstack/galera_clustercheck.erb template.
Closes-Bug: #1656249
Change-Id: Ie1a5d371fbe18a41f6b4b0f15e4076fd3dadfaca
(cherry picked from commit 9961a4b102)
0e9b4cafec