Tests: adjusted stream_udp_stream.t for slow hosts.

A stream could expire prematurely.

stream_udp_stream.t

diff --git a/stream_udp_stream.t b/stream_udp_stream.t
index d667374..e1943c8 100644
--- a/stream_udp_stream.t
+++ b/stream_udp_stream.t
@@ -33,7 +33,7 @@
 }
 
 stream {
-    proxy_timeout   500ms;
+    proxy_timeout   1s;
 
     server {
         listen      127.0.0.1:%%PORT_8980_UDP%% udp;
@@ -73,7 +73,7 @@
 
 }
 
-sleep 1;
+select undef, undef, undef, 1.1;
 
 isnt($s->io('1'), $data, 'udp_stream new session');