Merge pull request #752 from dosyfier/fix-gitcache-404

Fix #715 by correcting misuse of ActiveRecord API for GitCache objects

Author: PowerKiKi

Diff for: lib/redmine_git_hosting/cache/database.rb

@@ -47,7 +47,7 @@ def clear_cache_for_repository(repo_id)
         end
 
         def apply_cache_limit
-          GitCache.find(:last, order: 'created_at DESC').destroy if max_cache_elements >= 0 && GitCache.count > max_cache_elements
+          GitCache.order(:created_at).first.destroy if max_cache_elements >= 0 && GitCache.count > max_cache_elements
         end
       end
     end