[5.2] c10c28b try to stabilize this test

[PÃ¥l Hermunn Johansen]

commit c10c28b8319592c83f668e291f11d26b4d707abf
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Mon Sep 11 12:35:35 2017 +0200

    try to stabilize this test

diff --git a/bin/varnishtest/tests/p00007.vtc b/bin/varnishtest/tests/p00007.vtc
index 559f170..6b9e1be 100644
--- a/bin/varnishtest/tests/p00007.vtc
+++ b/bin/varnishtest/tests/p00007.vtc
@@ -56,6 +56,8 @@ varnish v1 -cliok "debug.persistent s0 dump"
 # Panic worker so second segment does not get closed
 varnish v1 -clierr 400 "debug.panic.worker"
 
+delay 0.5
+
 varnish v1 -cliok "panic.clear"
 
 delay 0.5