Increased tolerance for node stop/start and for topology convergence.

Change-Id: Ie9ea56918011b9e34c5ed6a6d426199bfe3e26d9
diff --git a/tools/test/bin/onos-check-summary b/tools/test/bin/onos-check-summary
index c1139c3..69bc0ac 100755
--- a/tools/test/bin/onos-check-summary
+++ b/tools/test/bin/onos-check-summary
@@ -6,7 +6,7 @@
 aux=/tmp/stc-$$.log
 trap "rm -f $aux 2>/dev/null" EXIT
 
-for i in {1..10}; do
+for i in {1..15}; do
     onos ${1:-$OCI} "onos:summary" > $aux
     cat $aux