Implement *_name methods to be used by Triggerable

Instead of relaying on params to get those values, we rely on the
methods project_name and package_name from now on.

src/api/app/controllers/trigger_controller.rb

@@ -16,6 +16,9 @@ class TriggerController < ApplicationController
 
   before_action :validate_gitlab_event, if: :gitlab_webhook?
   before_action :set_token
+  before_action :set_project_name
+  before_action :set_package_name
+  # From Triggerable
   before_action :set_project
   before_action :set_package
   before_action :set_object_to_authorize
@@ -64,4 +67,12 @@ def set_token
   def pundit_user
     @token.user
   end
+
+  def set_project_name
+    @project_name = params[:project]
+  end
+
+  def set_package_name
+    @package_name = params[:package]
+  end
 end