Switch to hacking 2.x

This supports Python 3 goodness. Some additional tox and gitignore
tweaks are included while we're here.

Change-Id: Id1a7a90119be242486584a3b5d6939083bfac84d
Signed-off-by: Stephen Finucane <sfinucan@redhat.com>

.gitignore

@@ -9,3 +9,5 @@ build/
 # pbr-generated stuff
 /AUTHORS
 /ChangeLog
+/RELEASENOTES.rst
+/releasenotes/notes/reno.cache

test-requirements.txt

@@ -2,10 +2,8 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=1.1.0,<1.2.0 # Apache-2.0
-
+hacking>=2.0.0,<2.1.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
-python-subunit>=1.0.0 # Apache-2.0/BSD
 oslotest>=3.2.0 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD

tox.ini

@@ -1,10 +1,10 @@
 [tox]
-minversion = 2.0
+minversion = 3.2
 envlist = py37,pep8
+ignore_basepython_conflict = true
 
 [testenv]
 basepython = python3
-install_command = pip install {opts} {packages}
 whitelist_externals =
   rm
 deps =
@@ -46,7 +46,9 @@ commands = oslo_debug_helper {posargs}
 
 [flake8]
 # E123, E125 skipped as they are invalid PEP-8.
+#
+# W504 skipped since you must choose either W503 or W504 (they conflict)
 show-source = True
-ignore = E123,E125,H405
+ignore = E123,E125,H405,W504
 builtins = _
 exclude=.venv,.git,.tox,dist,*lib/python*,*egg,build