enable galera clustercheck by default

Depends on:
- https://github.com/salt-formulas/salt-formula-galera/pull/30
- https://github.com/salt-formulas/salt-formula-haproxy/pull/36
- https://github.com/epcim/percona-clustercheck

Note: Haproxy clustercheck option is not enabled/forced by default,
to enable load haproxy.proxy.listen.openstack.galera.clustercheck

To release/upgrade notes:
- require corresponding reclass system-level and salt-formula-galera
- available_when_donor clustercheck option might be required to be
  - set to 1 during deployment
  - set to 1 during manual cluster bootstrap
- deploy first galera state w/clustercheck service, then haproxy state

Change-Id: I1f0bf89714297f528e597b08498df386dade6843
diff --git a/galera/server/cluster.yml b/galera/server/cluster.yml
index f1c3a48..1ab0aae 100644
--- a/galera/server/cluster.yml
+++ b/galera/server/cluster.yml
@@ -1,4 +1,20 @@
 classes:
 - service.keepalived.cluster.single
 - service.haproxy.proxy.single
-- system.haproxy.proxy.listen.openstack.galera
\ No newline at end of file
+- system.haproxy.proxy.listen.openstack.galera
+parameters:
+  galera:
+    clustercheck:
+      enabled: True
+      user: clustercheck
+      password: clustercheck
+      port: 9200
+      available_when_donor: 0
+      available_when_readonly: 0
+  mysql:
+    server:
+      users:
+      - name: clustercheck
+        password: clustercheck
+        database: '*.*'
+        grants: PROCESS