make vlan_id and creator fields in vOLT admin, make service_specific_attribute readonly
make vlan_id and creator fields in vOLT admin, make service_specific_attribute readonly

zdw/xos,zdw/xos,opencord/xos,opencord/xos,open-cloud/xos,open-cloud/xos,cboling/xos,cboling/xos,open-cloud/xos,cboling/xos,opencord/xos,zdw/xos,cboling/xos,cboling/xos,zdw/xos