test: add non-reg test checking pkinit after server install
Add a test with the following scenario:
ipa-server-install (with ca and pkinit enabled)
check that pkinit is properly enabled:
ipa-pkinit-manage status must return "enabled"
the KDC cert must be signed by IPA CA
Related to: https://pagure.io/freeipa/issue/7795
Reviewed-By: François Cami <fcami@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>