modified: catalog_zone_manager.py

modified:   management/commands/dns-export-zone.py
modified:   management/commands/dns-export-zones.py
modified:   management/commands/dns-transfer-endpoint.py
modified:   notify_handler.py
modified:   request_handler.py
Guard all db requests against broken database connections.

netbox_dns_bridge/management/commands/dns-export-zones.py

@@ -1,8 +1,4 @@
 import os
-import dns.zone
-import dns.rdatatype
-import dns.rdataclass
-import dns.exception
 import netbox_dns.models
 from netbox_dns_bridge.utils import export_bind_zone_file
 from django.core.management.base import BaseCommand, CommandError