Update hacking for Python3

The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.

Fix problems found.

Change-Id: I7a43ff6d91bad919dcaa450e66ef492a1d3a03ef

tackerclient/shell.py

@@ -104,6 +104,7 @@ class BashCompletionCommand(openstack_command.OpenStackCommand):
     """Prints all of the commands and options for bash-completion."""
     resource = "bash_completion"
 
+
 COMMAND_V1 = {
     'bash-completion': BashCompletionCommand,
     'ext-list': extension.ListExt,

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>=1.1.0,<1.2.0 # Apache-2.0
+hacking>=3.0,<3.1.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 ddt>=1.0.1 # MIT
 fixtures>=3.0.0 # Apache-2.0/BSD

tox.ini

@@ -46,7 +46,8 @@ commands =
 
 [flake8]
 # E125 continuation line does not distinguish itself from next logical line
-ignore = E125
+# W504 line break after binary operator
+ignore = E125,W504
 show-source = true
 exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,tools
 # F821 undefined name 'unicode'