[testing] Add most testing via tox.ini

Consolidate testing, so that things can be run from CLI, CI and
various other means in a consistent way by using tox.

* Updated all the flake8 tests in the tests folder.
* Added pylint as a neutral test so that we can work on this in stages
  and have some collaboration on what we test and don't
* The tox tests for unit, stageone, stagetwo testing makes is easier
  for users to know how to run tests, and not have to do things
  manually
* Using tox for CI doesn't make sense, as that will create virtual
  envs and will disregard system/snap based python modules so may not
  work

Signed-off-by: Arif Ali <arif.ali@canonical.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/report_tests/help_output_tests.py b/tests/report_tests/help_output_tests.py
index f1a4104b..8321f193 100644
--- a/tests/report_tests/help_output_tests.py
+++ b/tests/report_tests/help_output_tests.py
@@ -41,11 +41,11 @@ class ReportListPluginsTest(StageOneOutputTest):
         self.assertOutputContains('Profiles:')
 
     def test_no_missing_plugin_descriptions(self):
-        _out = re.search("The following plugins are currently enabled:(.*?)The following plugins are currently disabled:",
+        _out = re.search("The following plugins are currently enabled:(.*?)"
+                         "The following plugins are currently disabled:",
                          self.cmd_output.stdout, re.S).group(1).splitlines()
         for ln in _out:
             # Ignore newlines
             if not ln:
                 continue
             assert len(ln) > 1, "Plugin '%s' missing description" % ln[0]
-