Correctly handle the timezone in batch job logs

[yan12125]

At least with Podman, log timestamps contain timezone information
(ex: 2021-11-20T13:45:15+08:00). As a result, timestamps parsed with
ignoretz=True may be several hours later (ex: 8 hours) than the actual
time, causing logs to be rejected.

The issue can be reproduced by running tests on a UTC+8 machine:

$ DOCKER_HOST=unix:///run/user/1000/podman/podman.sock pytest -v tests/test_batch/test_batch_jobs.py -k test_submit_job --capture=no
============================================================================ test session starts =============================================================================
platform linux -- Python 3.9.7, pytest-6.2.5, py-1.10.0, pluggy-0.13.1 -- /usr/bin/python
cachedir: .pytest_cache
rootdir: /home/yen/tmp/moto, configfile: setup.cfg
plugins: anyio-3.3.4
collected 10 items / 8 deselected / 2 selected

tests/test_batch/test_batch_jobs.py::test_submit_job_by_name PASSED
tests/test_batch/test_batch_jobs.py::test_submit_job FAILED

================================================================================== FAILURES ==================================================================================
______________________________________________________________________________ test_submit_job _______________________________________________________________________________

self = <sure.AssertionBuilder object at 0x7fe8f1da7ee0>, args = (['hello'],), kw = {}

    @wraps(func)
    def wrapper(self, *args, **kw):
        try:
>           value = func(self, *args, **kw)

/usr/lib/python3.9/site-packages/sure/__init__.py:408:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <sure.AssertionBuilder object at 0x7fe8f1da7ee0>, what = ['hello'], epsilon = None

    @assertionmethod
    def equal(self, what, epsilon=None):
        """compares given object ``X``  with an expected ``Y`` object.

        It primarily assures that the compared objects are absolute equal ``==``.

        :param what: the expected value
        :param epsilon: a delta to leverage upper-bound floating point permissiveness
        """

        try:
            comparison = DeepComparison(self.obj, what, epsilon).compare()
            error = False
        except AssertionError as e:
            error = e
            comparison = None

        if isinstance(comparison, DeepExplanation):
            error = comparison.get_assertion(self.obj, what)

        if self.negative:
            if error:
                return True

            msg = "%s should differ from %s, but is the same thing"
            raise AssertionError(msg % (safe_repr(self.obj), safe_repr(what)))

        else:
            if not error:
                return True
>           raise error
E           AssertionError: given
E           X = []
E               and
E           Y = ['hello']
E           Y has 1 items whereas X has only 0

/usr/lib/python3.9/site-packages/sure/__init__.py:729: AssertionError

During handling of the above exception, another exception occurred:

    @mock_logs
    @mock_ec2
    @mock_ecs
    @mock_iam
    @mock_batch
    @pytest.mark.network
    def test_submit_job():
        ec2_client, iam_client, _, logs_client, batch_client = _get_clients()
        _, _, _, iam_arn = _setup(ec2_client, iam_client)
        start_time_milliseconds = time.time() * 1000

        job_def_name = str(uuid4())[0:6]
        commands = ["echo", "hello"]
        job_def_arn, queue_arn = prepare_job(batch_client, commands, iam_arn, job_def_name)

        resp = batch_client.submit_job(
            jobName=str(uuid4())[0:6], jobQueue=queue_arn, jobDefinition=job_def_arn
        )
        job_id = resp["jobId"]

        # Test that describe_jobs() returns 'createdAt'
        # github.com/spulec/moto/issues/4364
        resp = batch_client.describe_jobs(jobs=[job_id])
        created_at = resp["jobs"][0]["createdAt"]
        created_at.should.be.greater_than(start_time_milliseconds)

        _wait_for_job_status(batch_client, job_id, "SUCCEEDED")

        resp = logs_client.describe_log_streams(
            logGroupName="/aws/batch/job", logStreamNamePrefix=job_def_name
        )
        resp["logStreams"].should.have.length_of(1)
        ls_name = resp["logStreams"][0]["logStreamName"]

        resp = logs_client.get_log_events(
            logGroupName="/aws/batch/job", logStreamName=ls_name
        )
>       [event["message"] for event in resp["events"]].should.equal(["hello"])

tests/test_batch/test_batch_jobs.py:126:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self = <sure.AssertionBuilder object at 0x7fe8f1da7ee0>, args = (['hello'],), kw = {}

    @wraps(func)
    def wrapper(self, *args, **kw):
        try:
            value = func(self, *args, **kw)
        except AssertionError as e:
>           raise AssertionError(e)
E           AssertionError: given
E           X = []
E               and
E           Y = ['hello']
E           Y has 1 items whereas X has only 0

/usr/lib/python3.9/site-packages/sure/__init__.py:410: AssertionError
============================================================================== warnings summary ==============================================================================
../../../../usr/lib/python3.9/site-packages/boto/plugin.py:40
  /usr/lib/python3.9/site-packages/boto/plugin.py:40: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
    import imp

-- Docs: https://docs.pytest.org/en/stable/warnings.html
========================================================================== short test summary info ===========================================================================
FAILED tests/test_batch/test_batch_jobs.py::test_submit_job - AssertionError: given
============================================================ 1 failed, 1 passed, 8 deselected, 1 warning in 4.10s ============================================================

[bblommers]

LGTM! Thanks for the fix @yan12125

[github-actions]

This is now part of moto >= 2.2.16.dev21