Tunnel needs some extra time to reliably establish

* increased grace period for tunnel connection from 5s to 30s (default)

busunit/scripts/common_values.sh

@@ -39,7 +39,7 @@ SLEEP_BETWEEN_REDIALS="60"
 
 # How long to sleep after the GRPS session comes up before testing the SSH tunnel (attempting to connect to the 'hello' server)
 #
-SLEEP_BEFORE_TUNNEL_TEST="5"
+SLEEP_BEFORE_TUNNEL_TEST="30"
 
 # How long to sleep after an established tunnel goes down before allowing any SSH tunnel establishment retries
 #