Update to hacking 3.0

Update to newest hacking version, it has only minimal changes and full
support for Python 3.

Python modules related to coding style checks (listed in blacklist.txt in
openstack/requirements repo) are dropped from lower-constraints.txt
as they are not actually used in tests (other than pep8).

Change-Id: I67f390e6d7b6fb9eeb7522728ba293d3337b3327

disaster_recovery/backups/views.py

@@ -61,8 +61,8 @@ class RestoreView(workflows.WorkflowView):
     @shield('Unable to get backup.', redirect='backups:index')
     def get_workflow_name(self):
         backup = freezer_api.Backup(self.request).get(self.kwargs['backup_id'])
-        backup_date_str = datetime.datetime.fromtimestamp(int(backup.time_stamp))\
-            .strftime("%Y/%m/%d %H:%M")
+        backup_date_str = datetime.datetime.fromtimestamp(
+            int(backup.time_stamp)).strftime("%Y/%m/%d %H:%M")
         return "Restore '{}' from {}".format(backup.backup_name,
                                              backup_date_str)
 

lower-constraints.txt

@@ -1,5 +1,4 @@
 alabaster==0.7.10
-astroid==1.6.5
 Babel==2.5.3
 certifi==2018.1.18
 chardet==3.0.4
@@ -14,8 +13,6 @@ django-compressor==2.0
 docutils==0.14
 extras==1.0.0
 fixtures==3.0.0
-flake8==2.5.5
-hacking==0.12.0
 horizon==17.1.0
 idna==2.6
 imagesize==1.0.0
@@ -25,17 +22,13 @@ keystoneauth1==3.18.0
 linecache2==1.0.0
 logilab-common==1.4.1
 MarkupSafe==1.0
-mccabe==0.2.1
 netaddr==0.7.19
 oslo.config==5.2.0
 oslo.i18n==3.20.0
 oslo.log==3.36.0
 pbr==3.1.1
-pep8==1.5.7
 prettytable==0.7.2
-pyflakes==0.8.1
 Pygments==2.2.0
-pylint==1.9.2
 pyparsing==2.2.0
 pyperclip==1.6.0
 python-freezerclient==2.0.0

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>=3.0.1,<3.1.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
 oslo.config>=5.2.0 # Apache-2.0

tox.ini

@@ -42,9 +42,10 @@ commands = python setup.py build_sphinx
 commands = pylint --rcfile .pylintrc disaster_recovery
 
 [flake8]
+# W504 line break after binary operator
 exclude = .venv,.git,.tox,dist,*lib/python*,*egg,build,panel_template,dash_template,local_settings.py,*/local/*,*/test/test_plugins/*,.ropeproject,tools,doc
 max-complexity = 20
-ignore = H405,H404,H403,H401,H238,H306,H701
+ignore = H405,H404,H403,H401,H238,H306,H701,W504
 
 [testenv:lower-constraints]
 deps =