Merge branch 'entity-api-web-url' into 'master'

api: expose web_url for project entities

## What does this MR do?

Adds a `web_url` field to project snippet, issues, and merge request API returned objects.

## Are there points in the code the reviewer needs to double check?

Tests. Are they sufficient? (I'm working on getting them to pass.)

## Why was this MR needed?

Creating the URL for an MR or issue from the MR is tedious in API libraries; it's easy for Gitlab to just provide it.

## What are the relevant issue numbers?

N/A

## Screenshots (if relevant)

N/A

## Does this MR meet the acceptance criteria?

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

See merge request !5631

1 files changed, 21 insertions, 10 deletions

diff --git a/doc/api/issues.md b/doc/api/issues.md
index 443ba50af73..b194799ccbf 100644
--- a/doc/api/issues.md
+++ b/doc/api/issues.md
@@ -79,7 +79,8 @@ Example response:
       "labels" : [],
       "subscribed" : false,
       "user_notes_count": 1,
-      "due_date": "2016-07-22"
+      "due_date": "2016-07-22",
+      "web_url": "http://example.com/example/example/issues/6"
    }
 ]
 ```
@@ -156,7 +157,8 @@ Example response:
       "created_at" : "2016-01-04T15:31:46.176Z",
       "subscribed" : false,
       "user_notes_count": 1,
-      "due_date": null
+      "due_date": null,
+      "web_url": "http://example.com/example/example/issues/1"
    }
 ]
 ```
@@ -235,7 +237,8 @@ Example response:
       "created_at" : "2016-01-04T15:31:46.176Z",
       "subscribed" : false,
       "user_notes_count": 1,
-      "due_date": "2016-07-22"
+      "due_date": "2016-07-22",
+      "web_url": "http://example.com/example/example/issues/1"
    }
 ]
 ```
@@ -299,7 +302,8 @@ Example response:
    "created_at" : "2016-01-04T15:31:46.176Z",
    "subscribed": false,
    "user_notes_count": 1,
-   "due_date": null
+   "due_date": null,
+   "web_url": "http://example.com/example/example/issues/1"
 }
 ```
 
@@ -357,7 +361,8 @@ Example response:
    "milestone" : null,
    "subscribed" : true,
    "user_notes_count": 0,
-   "due_date": null
+   "due_date": null,
+   "web_url": "http://example.com/example/example/issues/14"
 }
 ```
 
@@ -418,7 +423,8 @@ Example response:
    "milestone" : null,
    "subscribed" : true,
    "user_notes_count": 0,
-   "due_date": "2016-07-22"
+   "due_date": "2016-07-22",
+   "web_url": "http://example.com/example/example/issues/15"
 }
 ```
 
@@ -496,7 +502,8 @@ Example response:
     "avatar_url": "http://www.gravatar.com/avatar/7a190fecbaa68212a4b68aeb6e3acd10?s=80&d=identicon",
     "web_url": "https://gitlab.example.com/u/solon.cremin"
   },
-  "due_date": null
+  "due_date": null,
+  "web_url": "http://example.com/example/example/issues/11"
 }
 ```
 
@@ -551,7 +558,8 @@ Example response:
     "avatar_url": "http://www.gravatar.com/avatar/7a190fecbaa68212a4b68aeb6e3acd10?s=80&d=identicon",
     "web_url": "https://gitlab.example.com/u/solon.cremin"
   },
-  "due_date": null
+  "due_date": null,
+  "web_url": "http://example.com/example/example/issues/11"
 }
 ```
 
@@ -607,7 +615,8 @@ Example response:
     "web_url": "https://gitlab.example.com/u/orville"
   },
   "subscribed": false,
-  "due_date": null
+  "due_date": null,
+  "web_url": "http://example.com/example/example/issues/12"
 }
 ```
 
@@ -693,7 +702,9 @@ Example response:
     "subscribed": true,
     "user_notes_count": 7,
     "upvotes": 0,
-    "downvotes": 0
+    "downvotes": 0,
+    "due_date": null,
+    "web_url": "http://example.com/example/example/issues/110"
   },
   "target_url": "https://gitlab.example.com/gitlab-org/gitlab-ci/issues/10",
   "body": "Vel voluptas atque dicta mollitia adipisci qui at.",