ipaclient: Add support for IPA 4.7 (4.6.90-pre2)

With IPA 4.7 bigger changes have been introduced

Changes:
- Use of timeconf and chrony instead of ntpconf and ntpd.
- A new option ntp_pool has been introduced.

roles/ipaclient/tasks/install.yml

@@ -30,6 +30,7 @@
     ca_cert_file: "{{ ipaclient_ca_cert_file | default(omit) }}"
     on_master: "{{ ipaclient_on_master }}"
     ntp_servers: "{{ ipaclient_ntp_servers | default([]) }}"
+    ntp_pool: "{{ ipaclient_ntp_pool | default(omit) }}"
     no_ntp: "{{ ipaclient_no_ntp }}"
   register: ipadiscovery