Fixing & enhancing STC test scenarios.

Change-Id: Ieff7ce5350a69d8ebb215a2344c67e41479cf371
diff --git a/tools/test/bin/onos-mininet b/tools/test/bin/onos-mininet
index 44d489b..ef2c8ea 100755
--- a/tools/test/bin/onos-mininet
+++ b/tools/test/bin/onos-mininet
@@ -6,7 +6,7 @@
 [ ! -d "$ONOS_ROOT" ] && echo "ONOS_ROOT is not defined" >&2 && exit 1
 . $ONOS_ROOT/tools/build/envDefaults
 
-export MAX_WAIT=45
+export MAX_WAIT=60
 
 cmd="$1" && shift
 log="screenlog.0"