Add environment to pipeline and build event examples

Author: lucasls

gitlab4j-models/src/test/resources/org/gitlab4j/models/build-event.json

@@ -54,6 +54,11 @@
 		"path_with_namespace": "gitlab-org/gitlab-test",
 		"default_branch": "master"
 	},
+    "environment": {
+        "name": "Test Env",
+        "action": "start",
+        "deployment_tier": "testing"
+    },
 	"runner": {
 		"active": true,
 		"runner_type": "project_type",

gitlab4j-models/src/test/resources/org/gitlab4j/models/pipeline-event.json

@@ -189,6 +189,11 @@
         "username": "root",
         "avatar_url": "http://www.gravatar.com/avatar/e32bd13e2add097461cb96824b7a829c?s=80\u0026d=identicon",
         "email": "[email protected]"
+      },
+      "environment": {
+        "name": "production",
+        "action": "start",
+        "deployment_tier": "production"
       }
     },
     {
@@ -304,6 +309,11 @@
         "username": "root",
         "avatar_url": "http://www.gravatar.com/avatar/e32bd13e2add097461cb96824b7a829c?s=80\u0026d=identicon",
         "email": "[email protected]"
+      },
+      "environment": {
+        "name": "staging",
+        "action": "start",
+        "deployment_tier": "staging"
       }
     }
   ]