add a system push example

Author: aritas1

testdata/gitlab/system-push-event.json

@@ -0,0 +1,50 @@
+{
+  "event_name": "push",
+  "before": "95790bf891e76fee5e1747ab589903a6a1f80f22",
+  "after": "da1560886d4f094c3e6c9ef40349f7d38b5d27d7",
+  "ref": "refs/heads/master",
+  "checkout_sha": "da1560886d4f094c3e6c9ef40349f7d38b5d27d7",
+  "user_id": 4,
+  "user_name": "John Smith",
+  "user_email": "[email protected]",
+  "user_avatar": "https://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=8://s.gravatar.com/avatar/d4c74594d841139328695756648b6bd6?s=80",
+  "project_id": 15,
+  "project":{
+    "name":"Diaspora",
+    "description":"",
+    "web_url":"http://example.com/mike/diaspora",
+    "avatar_url":null,
+    "git_ssh_url":"[email protected]:mike/diaspora.git",
+    "git_http_url":"http://example.com/mike/diaspora.git",
+    "namespace":"Mike",
+    "visibility_level":0,
+    "path_with_namespace":"mike/diaspora",
+    "default_branch":"master",
+    "homepage":"http://example.com/mike/diaspora",
+    "url":"[email protected]:mike/diaspora.git",
+    "ssh_url":"[email protected]:mike/diaspora.git",
+    "http_url":"http://example.com/mike/diaspora.git"
+  },
+  "repository":{
+    "name": "Diaspora",
+    "url": "[email protected]:mike/diaspora.git",
+    "description": "",
+    "homepage": "http://example.com/mike/diaspora",
+    "git_http_url":"http://example.com/mike/diaspora.git",
+    "git_ssh_url":"[email protected]:mike/diaspora.git",
+    "visibility_level":0
+  },
+  "commits": [
+    {
+      "id": "c5feabde2d8cd023215af4d2ceeb7a64839fc428",
+      "message": "Add simple search to projects in public area",
+      "timestamp": "2013-05-13T18:18:08+00:00",
+      "url": "https://dev.gitlab.org/gitlab/gitlabhq/commit/c5feabde2d8cd023215af4d2ceeb7a64839fc428",
+      "author": {
+        "name": "Example User",
+        "email": "[email protected]"
+      }
+    }
+  ],
+  "total_commits_count": 1
+}