Merge branch 'feature/orchestration' into 'master'

Orchestration files

See merge request !2

galera/orchestrate/init.sls

@@ -0,0 +1,14 @@
+galera_master:
+  salt.state:
+    - tgt: 'roles:galera.master'
+    - tgt_type: grain
+    - sls: galera
+
+galera_slaves:
+  salt.state:
+    - tgt: 'roles:galera.slave'
+    - tgt_type: grain
+    - sls: galera
+    - require:
+      - salt: galera_master
+