Fix build triggers URL and slack notifications

app/helpers/ci/routes_helper.rb

@@ -13,11 +13,11 @@ module Ci
     end
 
     def url_helpers
-      @url_helpers ||= Ci::Base.new
+      @url_helpers ||= Base.new
     end
 
     def self.method_missing(method, *args, &block)
-      @url_helpers ||= Ci::Base.new
+      @url_helpers ||= Base.new
 
       if @url_helpers.respond_to?(method)
         @url_helpers.send(method, *args, &block)

app/helpers/ci/triggers_helper.rb

 module Ci
   module TriggersHelper
-    def build_trigger_url(project_id, ref_name)
+    def ci_build_trigger_url(project_id, ref_name)
       "#{Settings.gitlab_ci.url}/ci/api/v1/projects/#{project_id}/refs/#{ref_name}/trigger"
     end
   end