dashboards as cfg: property path replaces folder

pkg/services/provisioning/dashboards/file_reader.go

@@ -34,9 +34,15 @@ type fileReader struct {
 }
 
 func NewDashboardFileReader(cfg *DashboardsAsConfig, log log.Logger) (*fileReader, error) {
-	path, ok := cfg.Options["folder"].(string)
+	var path string
+	path, ok := cfg.Options["path"].(string)
 	if !ok {
-		return nil, fmt.Errorf("Failed to load dashboards. folder param is not a string")
+		path, ok = cfg.Options["folder"].(string)
+		if !ok {
+			return nil, fmt.Errorf("Failed to load dashboards. path param is not a string")
+		}
+
+		log.Warn("[Deprecated] The folder property is deprecated. Please use path instead.")
 	}
 
 	if _, err := os.Stat(path); os.IsNotExist(err) {