Update hacking for Python3
The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.
Fix problems found by updated hacking version.
The tempest plugin is used on older branches as well.
We really only need hacking on master anyways,
where we no longer support python 2, so here we
make the requirement specific to python 3.
Change-Id: I885da1613e9cf754302700019a1207a279b3af2a
diff --git a/test-requirements.txt b/test-requirements.txt
index 47c128f..354a020 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -2,7 +2,7 @@
# of appearance. Changing the order has an impact on the overall integration
# process, which may cause wedges in the gate later.
-hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
+hacking>=3.0,<3.1.0;python_version>='3.5' # Apache-2.0
coverage!=4.4,>=4.0 # Apache-2.0
python-subunit>=1.0.0 # Apache-2.0/BSD