Put an upper limit on how many threads to create

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@4585 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishtest/tests/c00002.vtc

@@ -9,9 +9,10 @@ server s1 {
 	txresp -hdr "Connection: close" -body "012345\n"
 } -start
 
-varnish v1 -arg "-p thread_pool_min=2 -p thread_pools=4" -vcl+backend {} -start
+varnish v1 -arg "-p thread_pool_min=2 -p thread_pool_max=2 -p thread_pools=4" 
+
+varnish v1 -vcl+backend {} -start
 
-delay 1
 varnish v1 -expect n_wrk_create == 8
 
 client c1 {