findmissing: Add 5.7 as stable release, plus other pylint mandated changes

v5.7.y is the most recent stable release.

Other unrelated changes, necessary for repo upload to pass:

- import MySQLdb now results in import-error. This is pointless, since
  we make MySQLdb available (only) in a virtual environment. We could of
  course install MySQLdb to make pylint happy, but that would be even
  more pointless. Add "pylint: disable=import-error" to disable the check.
- pylint now complains about "class KernelMetadata(object)" and
  states that "object" is unnecessary. Let's hope that this is true
  and remove "object" from the class definition.

BUG=None
TEST=Run geopen tool

Change-Id: I63ebf8cdf55ebe966c7ea58e27e2ec53de35ad99
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2234285
Reviewed-by: Curtis Malainey <cujomalainey@chromium.org>
Commit-Queue: Guenter Roeck <groeck@chromium.org>
Tested-by: Guenter Roeck <groeck@chromium.org>
1 file changed