Rename roots to states

This commit renames the roots directory to states because it contains
salt states.

states/rabbitmq-server/init.sls

@@ -0,0 +1,17 @@
+rabbitmq-server:
+  pkg:
+    - installed
+  service:
+    - running
+    - requires:
+      - pkg: rabbitmq-server
+
+guest:
+  rabbitmq_user:
+    - absent
+
+rabbitmq_management:
+  rabbitmq_plugin:
+    - enabled
+    - watch_in:
+      - service: rabbitmq-server