This fixes the following failures when running "tox -e pep8":
./designatedashboard/dashboards/project/dns_domains/tables.py:55:15:
H201 no 'except:' at least use 'except Exception:'
except:
^
./designatedashboard/dashboards/project/dns_domains/tables.py:177:5:
H238 old style class declaration, use new style (inherit from `object`)
class Meta:
^
./designatedashboard/dashboards/project/dns_domains/tables.py:217:5:
H238 old style class declaration, use new style (inherit from `object`)
class Meta:
^
./designatedashboard/tests/base.py:53:66: W292 no newline at end of file
self.log_fixture = self.useFixture(fixtures.FakeLogger())
Change-Id: I33c4293edc16257ae8cebe7c76788075eae23a08