Load vue and vue resource separately on MR page.

app/assets/javascripts/diff_notes/diff_notes_bundle.js.es6

 /* eslint-disable */
-//= require vue
-//= require vue-resource
 //= require_directory ./models
 //= require_directory ./stores
 //= require_directory ./services

app/assets/javascripts/generic_bundles/vue_resource.js.es6

+//= require vue
+//= require vue-resource

app/views/projects/merge_requests/_show.html.haml

@@ -2,6 +2,7 @@
 - page_description     @merge_request.description
 - page_card_attributes @merge_request.card_attributes
 - content_for :page_specific_javascripts do
+  = page_specific_javascript_tag('generic_bundles/vue_resource.js')
   = page_specific_javascript_tag('diff_notes/diff_notes_bundle.js')
 
 .merge-request{'data-url' => merge_request_path(@merge_request)}

config/application.rb

@@ -94,6 +94,7 @@ module Gitlab
     config.assets.precompile << "profile/profile_bundle.js"
     config.assets.precompile << "protected_branches/protected_branches_bundle.js"
     config.assets.precompile << "diff_notes/diff_notes_bundle.js"
+    config.assets.precompile << "generic_bundles/vue_resource.js"
     config.assets.precompile << "issuable/issuable_bundle.js"
     config.assets.precompile << "boards/boards_bundle.js"
     config.assets.precompile << "cycle_analytics/cycle_analytics_bundle.js"