added test deploy step to wercker file

wercker.yml

@@ -29,4 +29,21 @@ build:
     - grunt:
     - grunt:
         cwd: grafana/
         cwd: grafana/
         tasks: release --mode=backend
         tasks: release --mode=backend
-
+deploy:
+  steps:
+  - add-to-known_hosts:
+     hostname: play.grafana.org
+   - mktemp:
+      envvar: PRIVATEKEY_PATH
+   - create-file:
+      name: write key
+      filename: $PRIVATEKEY_PATH
+      content: $GRAFANA_PLAY_PRIVATE
+      overwrite: true
+      hide-from-log: true
+   - script:
+      name: transfer application
+      code: |
+        pwd
+        ls -la
+        scp -i $PRIVATEKEY_PATH -o StrictHostKeyChecking=no -o UserKnownHostsFile=no grafana deploy@play.grafana.org:/home/deploy/