lint: sort imports

After configuring sort behavior in isort.cfg, run `isort` on all the
modules in the tree.

BUG=b:187788732
TEST=`cros lint` is clean

Change-Id: I9903ed513d3a1664ea1eb51cf3e898155474f4e3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1875547
Reviewed-by: Sloan Johnson <sloanjohnson@google.com>
Auto-Submit: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Sloan Johnson <sloanjohnson@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/conftest.py b/conftest.py
index 0e97891..e5e0bcb 100644
--- a/conftest.py
+++ b/conftest.py
@@ -24,7 +24,7 @@
 # We use wildcard imports here to make fixtures defined in the test module
 # globally visible.
 # pylint: disable=unused-wildcard-import, wildcard-import
-
+#
 # Importing from *_fixtures.py files into conftest.py is the only time a
 # module should use a wildcard import. *_fixtures.py files should ensure
 # that the only items visible to a wildcard import are pytest fixtures,