Add input plugin for rollbar service. (#1247)

* Report rollbar events.

Signed-off-by: Cyril Duez <cyril@stormz.me>
Signed-off-by: François de Metz <francois@stormz.me>

* Fix indent with go fmt.

* Add test for rollbar webhooks.

* Report more data from new_item event.

* Handle new deploy webhook.

Signed-off-by: Cyril Duez <cyril@stormz.me>
Signed-off-by: François de Metz <francois@stormz.me>

* Update default port.

* Add readme.

* Add rollbar_webhooks to the readme.

* Add rollbar_webhooks to plugins list.

* Add tag level for new_item event.

* Update readme.

* Update changelog.

plugins/inputs/rollbar_webhooks/rollbar_webhooks_events_json_test.go

@@ -0,0 +1,96 @@
+package rollbar_webhooks
+
+func NewItemJSON() string {
+	return `
+	{
+	  "event_name": "new_item",
+	  "data": {
+		"item": {
+		  "public_item_id": null,
+		  "integrations_data": {},
+		  "last_activated_timestamp": 1382655421,
+		  "unique_occurrences": null,
+		  "id": 272716944,
+		  "environment": "production",
+		  "title": "testing aobg98wrwe",
+		  "last_occurrence_id": 481761639,
+		  "last_occurrence_timestamp": 1382655421,
+		  "platform": 0,
+		  "first_occurrence_timestamp": 1382655421,
+		  "project_id": 90,
+		  "resolved_in_version": null,
+		  "status": 1,
+		  "hash": "c595b2ae0af9b397bb6bdafd57104ac4d5f6b382",
+		  "last_occurrence": {
+			"body": {
+			  "message": {
+				"body": "testing aobg98wrwe"
+			  }
+			},
+			"uuid": "d2036647-e0b7-4cad-bc98-934831b9b6d1",
+			"language": "python",
+			"level": "error",
+			"timestamp": 1382655421,
+			"server": {
+			  "host": "dev",
+			  "argv": [
+				""
+			  ]
+			},
+			"environment": "production",
+			"framework": "unknown",
+			"notifier": {
+			  "version": "0.5.12",
+			  "name": "pyrollbar"
+			},
+			"metadata": {
+			  "access_token": "",
+			  "debug": {
+				"routes": {
+				  "start_time": 1382212080401,
+				  "counters": {
+					"post_item": 3274122
+				  }
+				}
+			  },
+			  "customer_timestamp": 1382655421,
+			  "api_server_hostname": "web6"
+			}
+		  },
+		  "framework": 0,
+		  "total_occurrences": 1,
+		  "level": 40,
+		  "counter": 4,
+		  "first_occurrence_id": 481761639,
+		  "activating_occurrence_id": 481761639
+		}
+	  }
+	}`
+}
+
+func DeployJSON() string {
+	return `
+    {
+      "event_name": "deploy",
+      "data": {
+        "deploy": {
+          "comment": "deploying webs",
+          "user_id": 1,
+          "finish_time": 1382656039,
+          "start_time": 1382656038,
+          "id": 187585,
+          "environment": "production",
+          "project_id": 90,
+          "local_username": "brian",
+          "revision": "e4b9b7db860b2e5ac799f8c06b9498b71ab270bb"
+        }
+      }
+    }`
+}
+
+func UnknowJSON() string {
+	return `
+    {
+      "event_name": "roger"
+    }`
+}