There is wrong assumption that when server pillar is
defined the node is galera master, we need to check
actually that it is enabled.

Change-Id: I594c3fbdb1dfc829e7750c2fb1a6d4f5593074b2

Change-Id: I60e68e7cb4060c1b42789b2b17f21e325d9dfd92

Change-Id: I4de34ad6db6805235966ebcca6fe43ea1faaea42

Change-Id: I9daada1cf87873d602d415642bbc4bd32d8e2d52

Change-Id: Ia6873c44f4e5b179a6c4a545fbf4b45c978812ea

The tag is equal to the address of the server which is quite useless
when using a Unix socket address.

Change-Id: Ia87c30f8ff2176f923982d70b712b10ec6e97f56
Depends-On: I538dbb24602a8ad4aece0a74445db47810099bb9

Change-Id: I34d6d8146489bab30e5ee621e3b8d01fe7ff819b

Change-Id: Iec2d27cc4fdab9ba7772e9c26be66ba54f5aadfc
Depends-On: Ice4f38abfb0d870c56763dfeda2140032fa752a1

Because the cluster isn't managed by Pacemaker, using
majority_of_members is misleading.

This patch enables support for Grafana and provides a new dashboard.

This also installs 2 additional packages (libdbd-mysql and
python-pymysql) that are required for running the collectd plugins.