DNSSEC: FIX Do not re-create kasp.db if already exists

Kasp should not be replaced by DNS reinstallation with new file.

https://fedorahosted.org/freeipa/ticket/4657

Reviewed-By: Petr Spacek <pspacek@redhat.com>

ipaserver/install/opendnssecinstance.py

@@ -252,6 +252,7 @@ class OpenDNSSECInstance(service.Service):
         # run once only
         if self.get_state("KASP_DB_configured"):
             root_logger.debug("Already configured, skipping step")
+            return
 
         self.backup_state("KASP_DB_configured", True)