[freeipa PR#4420][opened] ipatests: always skip additional input for group-add-member --external

[abbra]

   URL: https://github.com/freeipa/freeipa/pull/4420
Author: abbra
 Title: #4420: ipatests: always skip additional input for group-add-member --external
Action: opened

PR body:
"""
'ipa group-add-member groupname --external some-object' will attempt to
ask interactive questions about other optional parameters (users and
groups) if only external group member was specified. This leads to a
timeout in the tests as there is no input provided.

Do not wait for the entry that would never come by using 'ipa -n'.

Related: https://pagure.io/freeipa/issue/8236
Signed-off-by: Alexander Bokovoy <abokovoy(a)redhat.com&gt;
"""

To pull the PR as Git branch:
git remote add ghfreeipa https://github.com/freeipa/freeipa
git fetch ghfreeipa pull/4420/head:pr4420
git checkout pr4420