STC - check that flows are installed before checking pings

Change-Id: Ia2853932db8e27bd1447d225b160c8e583d7df61
diff --git a/tools/test/bin/onos-check-flows b/tools/test/bin/onos-check-flows
index afff9af..ce80444 100755
--- a/tools/test/bin/onos-check-flows
+++ b/tools/test/bin/onos-check-flows
@@ -6,7 +6,7 @@
 aux=/tmp/stc-$$.log
 trap "rm -f $aux 2>/dev/null" EXIT
 
-for i in {1..5}; do
+for i in {1..6}; do
     onos ${1:-$OCI} "onos:flows" > $aux
     if grep "PENDING_" $aux; then
         sleep 5