[freeipa PR#5100][opened] [Backport][ipa-4-8] Add index for more trust-related attributes

[abbra]

   URL: https://github.com/freeipa/freeipa/pull/5100
Author: abbra
 Title: #5100: [Backport][ipa-4-8] Add index for more trust-related attributes
Action: opened

PR body:
"""
This PR was opened automatically because PR #5096 was pushed to master and backport to
ipa-4-8 is required.
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/5100/head:pr5100
git checkout pr5100