Fix docker ps truncate long image name by default

Signed-off-by: Lei Jitang <leijitang@huawei.com>
Upstream-commit: 3fcf481361400acd5e56da2a8c76cf888092b2e4
Component: engine

components/engine/docs/reference/api/docker_remote_api.md

@@ -89,6 +89,7 @@ list of DNS options to be used in the container.
 * `POST /build` now optionally takes a serialized map of build-time variables.
 * `GET /events` now includes a `timenano` field, in addition to the existing `time` field.
 * `GET /info` now lists engine version information.
+* `GET /containers/json` will return `ImageID` of the image used by container.
 
 ### v1.20 API changes
 

components/engine/docs/reference/api/docker_remote_api_v1.21.md

@@ -47,6 +47,7 @@ List containers
                  "Id": "8dfafdbc3a40",
                  "Names":["/boring_feynman"],
                  "Image": "ubuntu:latest",
+		 "ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
                  "Command": "echo 1",
                  "Created": 1367854155,
                  "Status": "Exit 0",
@@ -63,6 +64,7 @@ List containers
                  "Id": "9cd87474be90",
                  "Names":["/coolName"],
                  "Image": "ubuntu:latest",
+		 "ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
                  "Command": "echo 222222",
                  "Created": 1367854155,
                  "Status": "Exit 0",
@@ -75,6 +77,7 @@ List containers
                  "Id": "3176a2479c92",
                  "Names":["/sleepy_dog"],
                  "Image": "ubuntu:latest",
+		 "ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
                  "Command": "echo 3333333333333333",
                  "Created": 1367854154,
                  "Status": "Exit 0",
@@ -87,6 +90,7 @@ List containers
                  "Id": "4cb07b47f9fb",
                  "Names":["/running_cat"],
                  "Image": "ubuntu:latest",
+		 "ImageID": "d74508fb6632491cea586a1fd7d748dfc5274cd6fdfedee309ecdcbc2bf5cb82",
                  "Command": "echo 444444444444444444444444444444444",
                  "Created": 1367854152,
                  "Status": "Exit 0",