Fix routing error for helpers

Due to moving the helpers into their own folder, the modules were not
defined properly anymore.

app/helpers/crawlers/courses_crawler_helper.rb

@@ -1,2 +1,2 @@
-module CoursesCrawlerHelper
+module Crawlers::CoursesCrawlerHelper
 end

app/helpers/crawlers/people_crawler_helper.rb

@@ -1,2 +1,2 @@
-module PeopleCrawlerHelper
+module Crawlers::PeopleCrawlerHelper
 end

app/helpers/crawlers/projects_crawler_helper.rb

@@ -1,2 +1,2 @@
-module ProjectsCrawlerHelper
+module Crawlers::ProjectsCrawlerHelper
 end

app/helpers/crawlers/theses_crawler_helper.rb

@@ -1,2 +1,2 @@
-module ThesesCrawlerHelper
+module Crawlers::ThesesCrawlerHelper
 end

app/helpers/crawlers/tiss_crawler_helper.rb

@@ -1,2 +1,2 @@
-module TissCrawlerHelper
+module Crawlers::TissCrawlerHelper
 end