Add new webhooks plugin that superseed github and rollbar plugins.

closes #1289

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

Rename internals struct.

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

Update changelog.

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

Update READMEs and CHANGELOG.

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

Update SampleConfig.

Update the config format.

Update telegraf config.

Update the webhooks README.

Update changelog.

Update the changelog with an upgrade path.

Update default ports.

Fix indent.

Check for nil value on AvailableWebhooks.

Check for CanInterface.

plugins/inputs/webhooks/rollbar/rollbar_webhooks_events.go

@@ -0,0 +1,78 @@
+package rollbar
+
+import "strconv"
+
+type Event interface {
+	Tags() map[string]string
+	Fields() map[string]interface{}
+}
+
+type DummyEvent struct {
+	EventName string `json:"event_name"`
+}
+
+type NewItemDataItemLastOccurence struct {
+	Language string `json:"language"`
+	Level    string `json:"level"`
+}
+
+type NewItemDataItem struct {
+	Id            int                          `json:"id"`
+	Environment   string                       `json:"environment"`
+	ProjectId     int                          `json:"project_id"`
+	LastOccurence NewItemDataItemLastOccurence `json:"last_occurrence"`
+}
+
+type NewItemData struct {
+	Item NewItemDataItem `json:"item"`
+}
+
+type NewItem struct {
+	EventName string      `json:"event_name"`
+	Data      NewItemData `json:"data"`
+}
+
+func (ni *NewItem) Tags() map[string]string {
+	return map[string]string{
+		"event":       ni.EventName,
+		"environment": ni.Data.Item.Environment,
+		"project_id":  strconv.Itoa(ni.Data.Item.ProjectId),
+		"language":    ni.Data.Item.LastOccurence.Language,
+		"level":       ni.Data.Item.LastOccurence.Level,
+	}
+}
+
+func (ni *NewItem) Fields() map[string]interface{} {
+	return map[string]interface{}{
+		"id": ni.Data.Item.Id,
+	}
+}
+
+type DeployDataDeploy struct {
+	Id          int    `json:"id"`
+	Environment string `json:"environment"`
+	ProjectId   int    `json:"project_id"`
+}
+
+type DeployData struct {
+	Deploy DeployDataDeploy `json:"deploy"`
+}
+
+type Deploy struct {
+	EventName string     `json:"event_name"`
+	Data      DeployData `json:"data"`
+}
+
+func (ni *Deploy) Tags() map[string]string {
+	return map[string]string{
+		"event":       ni.EventName,
+		"environment": ni.Data.Deploy.Environment,
+		"project_id":  strconv.Itoa(ni.Data.Deploy.ProjectId),
+	}
+}
+
+func (ni *Deploy) Fields() map[string]interface{} {
+	return map[string]interface{}{
+		"id": ni.Data.Deploy.Id,
+	}
+}