ansible_ipa_client: Always set options.unattended

This has not been done so far in the ansible_ipa_client, but only in the
modules where it was really needed. But as these places are getting more
with 4.7.90, this setting makes it into the module_utils.

roles/ipaclient/library/ipaclient_join.py

@@ -180,7 +180,6 @@ def main():
     sssd = True
 
     options.ca_cert_file = ca_cert_file
-    options.unattended = True
     options.principal = principal
     options.force = False
     options.password = password