Wrong timezone conversion

[choonho]

Formatter always return UTC-0 style not by timezone.

FORMATTER_DEFAULT_TMPL = {
    "standard": {
        "format": "%(asctime)s.%(msecs)03dZ [%(levelname)s] %(trace_id)s %(domain_id)s %(audience)s %(role_type)s %(workspace_id)s %(tnx_method)s (%(filename)s:%(lineno)d) %(message)s %(params)s %(traceback)s",
        "datefmt": "%Y-%m-%dT%H:%M:%S",
    },
    "file": {
        "format": '{"time": "%(asctime)s.%(msecs)03dZ", "level": "%(levelname)s", "peer": "%(peer)s", "trace_id": "%(trace_id)s", "domain_id": "%(domain_id)s", "audience": "%(audience)s", "role_type": "%(role_type)s", "tnx_method": "%(tnx_method)s", "file_name": "%(filename)s", "line": %(lineno)d, "parameter": %(params_log)s, "message": %(msg_dump)s, "error": { "code": "%(error_code)s", "message": "%(error_message)s", "traceback": %(traceback_log)s }}',
        "datefmt": "%Y-%m-%dT%H:%M:%S",
    },