Remove the <Interval> from opendnssec conf

In opendnssec 2.1.6, the <Interval> element is not supported in the
configuration file.

Related: https://pagure.io/freeipa/issue/8214
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>

install/share/opendnssec_conf.template

@@ -33,7 +33,7 @@
 		</Privileges>
 
 		<Datastore><SQLite>$KASP_DB</SQLite></Datastore>
-		<Interval>PT3600S</Interval>
+		$INTERVAL
 		<!-- <ManualKeyGeneration/> -->
 		<!-- <RolloverNotification>P14D</RolloverNotification> -->
 

ipaserver/install/opendnssecinstance.py

@@ -179,6 +179,12 @@ class OpenDNSSECInstance(service.Service):
         # add pin to template
         sub_conf_dict = self.conf_file_dict
         sub_conf_dict['PIN'] = pin
+        if paths.ODS_KSMUTIL is not None and os.path.exists(paths.ODS_KSMUTIL):
+            # OpenDNSSEC 1.4
+            sub_conf_dict['INTERVAL'] = '<Interval>PT3600S</Interval>'
+        else:
+            # OpenDNSSEC 2.x
+            sub_conf_dict['INTERVAL'] = '<!-- Interval not used in 2x -->'
 
         ods_conf_txt = ipautil.template_file(
             os.path.join(paths.USR_SHARE_IPA_DIR, "opendnssec_conf.template"),