[6.0] d5e88cf73 Stabilize this test

[Dridi Boukelmoune]

commit d5e88cf733720f6fa3ef07643a9a982a5b70631d
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Mon Apr 30 09:29:24 2018 +0000

    Stabilize this test

diff --git a/bin/varnishtest/tests/u00010.vtc b/bin/varnishtest/tests/u00010.vtc
index fc555ff8a..5813db981 100644
--- a/bin/varnishtest/tests/u00010.vtc
+++ b/bin/varnishtest/tests/u00010.vtc
@@ -2,7 +2,7 @@ varnishtest	"trivial run of varnishtop in curses mode"
 
 server s1 {
 	rxreq
-	txresp
+	txresp -hdr "Connection: close"
 } -start
 
 varnish v1 -vcl+backend {} -start