Add example for container commit

This patch adds missing example for container commit.

Change-Id: Iac31e55882b66258aa201b17718d9889834b7766
Depends-on: I250b743d8adc6cd6b41039bb3431eff35c4c030c

api-ref/source/containers.inc

@@ -665,7 +665,7 @@ Commit a container
 
 .. rest_method:: POST /v1/containers/{container_ident}/commit?tag={tag}&repository={repository}
 
-Create a new image from a container's changes
+Create a new image from a container's changes.
 
 Response Codes
 --------------
@@ -697,6 +697,12 @@ Response
 
   - image: image
 
+Response Example
+----------------
+
+.. literalinclude:: samples/container-commit-resp.json
+   :language: javascript
+
 
 Detach a network from a container
 =================================

api-ref/source/samples/container-commit-resp.json

@@ -0,0 +1,3 @@
+{
+    "uuid": "64281d85-e9a3-4c54-8d30-9ee72a596d8a"
+}