Fix nova integration job

Running it turned up a bunch of false positives around delayed LOG
string interpolation, so we need to fix our pattern match from
`.format` to `.format(` to avoid incorrectly catching things like
`.format_message()`.

We also add the E checks in the Nova integration tests. As we saw in
the previous commit, sometimes flake8 gets bugs that caused things
that would normally get flagged to not actually get flagged, like
lines longer than 80 chars in docstrings. By running Nova
integration with E, we make sure any such changes are caught ahead of
time.

Depends-on: https://review.opendev.org/c/openstack/nova/+/874517
Change-Id: I236a25e5380b5492009d587e76347e52ec50c09f

.zuul.yaml

@@ -18,4 +18,4 @@
       - openstack/nova
     vars:
       tox_envlist: integration
-      tox_extra_args: -vv openstack nova {{ ansible_user_dir }}/{{ zuul.projects['opendev.org/openstack/nova'].src_dir }}
+      tox_extra_args: -- openstack nova {{ ansible_user_dir }}/{{ zuul.projects['opendev.org/openstack/nova'].src_dir }}

integration-test/test.sh

@@ -47,7 +47,7 @@ pip install .
 # Reinstall hacking, the above might have uninstalled it
 pip install $HACKING
 
-flake8 --select H --statistics
+flake8 --select E,H --statistics
 RET=$?
 popd