Fix LDAP URL to use hostname instead of IP address

Use edpm_node_hostname variable instead of IP address to avoid
TLS certificate hostname mismatch error when keystone connects
to LDAP server.

The IP address (192.168.122.100) in the LDAP URL caused:
'ldap.SERVER_DOWN: TLS: hostname does not match name in peer certificate'

This fix ensures the LDAP URL uses the hostname (ipa.ooo.test)
which matches the certificate CN/SAN.

Fixes: OSPRH-6861
Related: PR #970

Author: millevy

tests/roles/keystone_adoption/tasks/main.yaml

@@ -37,7 +37,7 @@
         [identity]
         driver = ldap
         [ldap]
-        url = ldaps://{{ standalone_ip | default(edpm_node_ip) }}
+        url = ldaps://{{ edpm_node_hostname | default('ipa.ooo.test') }}
         user = uid=svc-ldap,cn=users,cn=accounts,{{ ipa_basedn }}
         password = {{ ipa_admin_password | default('nomoresecrets') }}
         suffix = {{ ipa_basedn }}