Update request wrapper with password and A6 signature

[ChristineTChen]

What does this PR do?

Cisco_aci uses the request wrapper but uses the older agent signature. Also add pwd to remapping.

Motivation

Additional Notes

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• PR title must be written as a CHANGELOG entry (see why)
• Files changes must correspond to the primary purpose of the PR as described in the title (small unrelated changes should have their own PR)
• PR must have changelog/ and integration/ labels attached

[AlexandreYang]

Could you cover this in tests ?

Example:

integrations-core/etcd/tests/test_integration.py

Lines 162 to 192 in 1bf1bcf

	@preview
	@pytest.mark.parametrize(
	'test_case, extra_config, expected_http_kwargs',
	[
	("new auth config", {'username': 'new_foo', 'password': 'new_bar'}, {'auth': ('new_foo', 'new_bar')}),
	("legacy ssl config True", {'ssl_verify': True}, {'verify': True}),
	("legacy ssl config False", {'ssl_verify': False}, {'verify': False}),
	("legacy ssl config unset", {}, {'verify': False}),
	("timeout", {'prometheus_timeout': 100}, {'timeout': (100.0, 100.0)}),
	],
	)
	def test_config(instance, test_case, extra_config, expected_http_kwargs):
	instance.update(extra_config)
	check = Etcd(CHECK_NAME, {}, [instance])
	with mock.patch('datadog_checks.base.utils.http.requests') as r:
	r.get.return_value = mock.MagicMock(status_code=200)
	check.check(instance)
	http_kwargs = dict(
	auth=mock.ANY,
	cert=mock.ANY,
	data=mock.ANY,
	headers=mock.ANY,
	proxies=mock.ANY,
	timeout=mock.ANY,
	verify=mock.ANY,
	)
	http_kwargs.update(expected_http_kwargs)
	r.post.assert_called_with(URL + '/v3alpha/maintenance/status', **http_kwargs)

And maybe add a test for existing ssl_verify remapping :)

[ofek]

Christine's PTO, we'll get this in and add tests during QA