fix MySQL problem with query

lib/gitlab/cycle_analytics/events_query.rb

@@ -14,7 +14,7 @@ module Gitlab
         @config = QueryConfig.get(stage)
         query = build_query(&block)
 
-        ActiveRecord::Base.connection.execute(query.to_sql).to_a
+        ActiveRecord::Base.connection.exec_query(query.to_sql)
       end
 
       private

lib/gitlab/light_url_builder.rb

@@ -19,7 +19,7 @@ module Gitlab
 
     def url
       url_method = "#{@entity}_url"
-      raise NotImplementedError.new("No Light URL builder defined for #{@entity.to_s}") unless respond_to?(url_method)
+      raise NotImplementedError.new("No Light URL builder defined for #{@entity}") unless respond_to?(url_method)
 
       public_send(url_method)
     end