created item groups and link banners and their associations and fixed bugs with join tables

back-office/test/fixtures/link_banners.yml

@@ -0,0 +1,33 @@
+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+one:
+  image_url: MyString
+  start_page: false
+  section_id: 1
+  category_id: 1
+  sub_category_id: 1
+  item_id: 1
+  thank_you_page: false
+  search_result_page: false
+  checkout_page: false
+  beginning: 2015-03-22
+  ending: 2015-03-22
+  footer: false
+  header: false
+  link_url: MyString
+
+two:
+  image_url: MyString
+  start_page: false
+  section_id: 1
+  category_id: 1
+  sub_category_id: 1
+  item_id: 1
+  thank_you_page: false
+  search_result_page: false
+  checkout_page: false
+  beginning: 2015-03-22
+  ending: 2015-03-22
+  footer: false
+  header: false
+  link_url: MyString