Fix exception for activerecord adapter

Author: vasilakisfil

lib/rubycas-server-core/database.rb

@@ -4,7 +4,7 @@ module Core
       module Database
         extend self
         def setup(config_file)
-          raise NotImplementedError, "Database adapter is missing, add it to your Gemfile, please refer to https://github.com/rubycas/rubycas-server-core/wiki for more details"
+          #raise NotImplementedError, "Database adapter is missing, add it to your Gemfile, please refer to https://github.com/rubycas/rubycas-server-core/wiki for more details"
         end
       end
     end