fix typo

db/migrate/20161226122833_remove_dot_git_from_usernames.rb

@@ -71,7 +71,7 @@ class RemoveDotGitFromUsernames < ActiveRecord::Migration
     route_exists = route_exists?(path)
     Gitlab.config.repositories.storages.each_value do |storage|
-      if route_exists && path_exists?(path, storage)
+      if route_exists || path_exists?(path, storage)
         counter += 1
         path = "#{base}#{counter}"