ipatests: fix ldap server url
master.external_hostname was used to construct ldap url
which caused ldappasswd utility to exit with error due to host name
mismatch in client certificate. master.hostname should be used instead
as this name is used to generate certificate.
Fixes https://pagure.io/freeipa/issue/7844
Signed-off-by: Sergey Orlov <sorlov@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>