[freeipa PR#1001][opened] Fix ipa config-mod --ca-renewal-master

[flo-renaud]

   URL: https://github.com/freeipa/freeipa/pull/1001
Author: flo-renaud
 Title: #1001: Fix ipa config-mod --ca-renewal-master
Action: opened

PR body:
"""
commit bddb90f38a3505a2768862d2f814c5e749a7dcde added the support for
multivalued server attributes (for pkinit_server_server), but this
introduced an API change where the setter and getter of ServerAttribute
are expecting list of values.

When a SingleValuedServerAttribute is used, we need to convert one elem
into a list containing this elem and vice-versa, so that the ipa config-mod
and ipa config_show APIs are not modified.

https://pagure.io/freeipa/issue/7120
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/1001/head:pr1001
git checkout pr1001