Update hacking requirement
This patch set updates test-requirements.txt to use the latest versions
of hacking. There is no reason to cap the hacking version to 0.14, as
other OpenStack project such as ironic [0] has brought the minimum
hacking version to 1.0.0.
Closes-Bug:
[0]
# process, which may cause wedges in the gate later.
coverage!=4.4,>=4.0 # Apache-2.0
fixtures>=3.0.0 # Apache-2.0/BSD
-hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
+hacking>=1.0.0 # Apache-2.0
mock>=2.0.0 # BSD
stestr>=1.0.0 # Apache-2.0
testscenarios>=0.4 # Apache-2.0/BSD
