findmissing: gerrit_interface: Convert to use logging facility

With logging now set up, let's use it.

BUG=None
TEST=Run on GCE or locally

Change-Id: Ia95353f9538874149b484a864e5575d0a75794b6
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2197236
Commit-Queue: Guenter Roeck <groeck@chromium.org>
Tested-by: Guenter Roeck <groeck@chromium.org>
Reviewed-by: Curtis Malainey <cujomalainey@chromium.org>
1 file changed