The change adds in the ability for the role to take care of a major upgrade
in a version of an installed mariadb galera cluster.
The change adds a new task file that checks if the installed version of the
galera cluster matches that of the specified major version. The role will
hard stop if there is a version mismatch and the option "galera_upgrade=true"
is not passed.
Change-Id: I26560668325d45f670c8b946c978c48559f58419
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>
b651fa3bd8