This change adds a job to the Grafana chart that allows for the
changing of the grafana admin user password if required, as
Grafana only allows the changing of this password via the
grafana-admin CLI or via an http call that requires both the old
and new password
Change-Id: I59a5d26edc4aa4da16e80c5454ecdebbae3a1d15
65ce9c73d7