Git hook messages: wiki access fix

lib/gitlab/git_access_wiki.rb

 module Gitlab
   class GitAccessWiki < GitAccess
-    def change_allowed_check(user, project, change)
+    def change_access_check(user, project, change)
       if user.can?(:write_wiki, project)
         build_status_object(true)
       else

spec/lib/gitlab/git_access_wiki_spec.rb

@@ -13,7 +13,7 @@ describe Gitlab::GitAccessWiki do
 
     subject { access.push_access_check(user, project, changes) }
 
-    it { subject.should be_true }
+    it { subject.allowed?.should be_true }
   end
 
   def changes