Format SwiftRawDisks before attempting to mount

Current play only attempts to mount the disk and does not actually
format it for Swift usage.

Change-Id: I8e47b977407491faa71bb196211eeccf21357c54

docker/services/swift-storage.yaml

@@ -436,7 +436,24 @@ outputs:
             src: /var/log/swift
             dest: /var/log/containers/swift
             state: link
-        - name: Format and mount devices defined in SwiftRawDisks
+        - name: swift logs readme
+          copy:
+            dest: /var/log/swift/readme.txt
+            content: |
+              Log files from swift containers can be found under
+              /var/log/containers/swift and /var/log/containers/httpd/swift-*.
+          ignore_errors: true
+        - name: Format SwiftRawDisks
+          filesystem:
+            fstype: xfs
+            dev: /dev/{{ item }}
+            opts: -f -i size=1024
+          with_items:
+            - repeat:
+                template: 'DEVICE'
+                for_each:
+                  DEVICE: {get_param: SwiftRawDisks}
+        - name: Mount devices defined in SwiftRawDisks
           mount:
             name: /srv/node/{{ item }}
             src: /dev/{{ item }}