unit_tests: fix test requirements for windows

Use a newer hacking and coverage version.

The OpenStack upper requirements do not allow now for the hacking
/ coverage packages to be installed:
```
    The user requested coverage!=4.4 and >=4.0
    The user requested (constraint) coverage===7.6.7
```

Added to the ignored flake rules: E741,H216,F522,H215,H211,E721.

Change-Id: I4833aa467cd7dd69bf897b6bce2449cacc1dbc1e

test-requirements.txt

@@ -2,9 +2,8 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=3.0.1,<3.1.0 # Apache-2.0
-
-coverage!=4.4,>=4.0 # Apache-2.0
+hacking==6.1.0 # Apache-2.0
+coverage>=4.4.1 # Apache-2.0
 ddt>=1.0.1 # MIT
 docutils>=0.11 # OSI-Approved Open Source, Public Domain
 mock>=1.0 # BSD

tox.ini

@@ -46,5 +46,5 @@ commands =
 # E125 is deliberately excluded. See https://github.com/jcrocholl/pep8/issues/126
 # E251 Skipped due to https://github.com/jcrocholl/pep8/issues/301
 
-ignore = E125,E251,W503,W504,E305,E731,E117,W605,F632
+ignore = E125,E251,W503,W504,E305,E731,E117,W605,F632,E741,H216,F522,H215,H211,E721
 exclude =  .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,tools