re-kinit after ipa-restore in backup/restore CI tests
In FreeIPA CI-tests the install_master task automatically performs kinit after
successfull installation. This may break some backup/restore tests which
perform backup into previously installed IPA master. In this case it is
neccessary to re-kinit after restore.
https://fedorahosted.org/freeipa/ticket/5326
Reviewed-By: Martin Basti <mbasti@redhat.com>