During the first run, grafana will run migrator job, which populates
necessary fields in database. Previously, if there are two or more
grafana pods which start up simultaneously, it causes the race condition
for database access and finally one of the pods will fail (in some
cases both of them), leaving the grafana database in incomplete state.
Signed-off-by: Ruslan Aliev <raliev@mirantis.com>
Change-Id: I5a7993b3cad2d48af3f73218d6c61c216520e1c5
e99dfc1c84