Fix refinerycms-page-images specs

fix_test.diff

diff --git a/spec/requests/attach_page_images_spec.rb b/spec/requests/attach_page_images_spec.rb
index 6a6692e..d2f9b91 100644
--- a/spec/requests/attach_page_images_spec.rb
+++ b/spec/requests/attach_page_images_spec.rb
@@ -12,7 +12,7 @@ describe "attach page images" do
   end
 
   it "shows images tab" do
-    within "#custom_images_tab" do
+    within "#custom_Images_tab" do
       page.should have_content("Images")
     end
   end
@@ -20,7 +20,7 @@ describe "attach page images" do
   # This spec actually is broken in a way because Add Image link would
   # be visible to capybara even if we don't click on Images tab.
   it "shows add image link" do
-    within "#custom_images_tab" do
+    within "#custom_Images_tab" do
       click_link "Images"
     end