Test migration to dnssec-policy with views

This test case is unrelated to the fix for #2171 but was added to
reproduce the problem.

(cherry picked from commit 621093fe69)

bin/tests/system/kasp/ns7/template.ext.db.in

@@ -0,0 +1,22 @@
+; Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+;
+; This Source Code Form is subject to the terms of the Mozilla Public
+; License, v. 2.0. If a copy of the MPL was not distributed with this
+; file, You can obtain one at http://mozilla.org/MPL/2.0/.
+;
+; See the COPYRIGHT file distributed with this work for additional
+; information regarding copyright ownership.
+
+$TTL 300
+@		IN	SOA  mname1. . (
+			1       ; serial
+			20      ; refresh (20 seconds)
+			20      ; retry (20 seconds)
+			1814400 ; expire (3 weeks)
+			3600    ; minimum (1 hour)
+			)
+
+			NS	ns7
+ns7			A	10.53.0.7
+
+view			TXT	"external"