Isolate cluster check otpion to separate class

Change-Id: I016f0bc2cf33cf56b261bd16180a072a3bfa4d08
diff --git a/galera/server/clustercheck.yml b/galera/server/clustercheck.yml
new file mode 100644
index 0000000..a5d7137
--- /dev/null
+++ b/galera/server/clustercheck.yml
@@ -0,0 +1,18 @@
+parameters:
+  _param:
+    galera_clustercheck_password: clustercheck
+  galera:
+    clustercheck:
+      enabled: True
+      user: clustercheck
+      password: ${_param:galera_clustercheck_password}
+      port: 9200
+      available_when_donor: 0
+      available_when_readonly: 0
+  mysql:
+    server:
+      users:
+      - name: clustercheck
+        password: ${_param:galera_clustercheck_password}
+        database: '*.*'
+        grants: PROCESS