[freeipa PR#1296][opened] [Backport][ipa-4-5] adtrust: filter out subdomains when defining our topology to AD

[abbra]

   URL: https://github.com/freeipa/freeipa/pull/1296
Author: abbra
 Title: #1296: [Backport][ipa-4-5] adtrust: filter out subdomains when defining our
topology to AD
Action: opened

PR body:
"""
This PR was opened automatically because PR #1179 was pushed to master and backport to
ipa-4-5 is required.
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/1296/head:pr1296
git checkout pr1296