ranch listener case clause error fix

[zhizhen]

fix these errors:
11:20:03.653 [error] Lager event handler error_logger_lager_h exited with reason {'EXIT',{{case_clause,[reader,{ack,<0.614.0>,{error,timeout}}]},[{error_logger_lager_h,log_event,2,[{file,"src/error_logger_lager_h.erl"},{line,184}]},{gen_event,server_update,4,[{file,"gen_event.erl"},{line,533}]},{gen_event,server_notify,4,[{file,"gen_event.erl"},{line,515}]},{gen_event,server_notify,4,[{file,"gen_event.erl"},{line,517}]},{gen_event,handle_msg,5,[{file,"gen_event.erl"},{line,256}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,247}]}]}}

[jadeallenx]

Looks good, thanks very much!

[getong]

@zhizhen @mrallen1 Look at #366 , ranch error should be handled more.

[jadeallenx]

should be fixed by merging #366 - so going to close this.