Merge branch 'release-0.39.0' into develop

* release-0.39.0:
  Bumping version to 0.39.0
  Update opsworks model to latest version
Fix bug in xform_name for already transformed names

This is a regression introduced from https://github.com/boto/botocore/pull/240

The fix here is to not translate names if they already appear
to be translated.
Merge branch 'cloudtrail-args' into develop

* cloudtrail-args:
  Fix bug in xform_name for already transformed names
Bumping version to 0.40.0
Merge branch 'release-0.40.0'

* release-0.40.0:
  Bumping version to 0.40.0
  Fix bug in xform_name for already transformed names