Adding multi-instance support for flow stats.

Change-Id: I428c5a7cb58f4f9773a125fc94fb368ed846cb0d
diff --git a/tools/test/bin/onos-check-apps b/tools/test/bin/onos-check-apps
index 03df7dc..9760a41 100755
--- a/tools/test/bin/onos-check-apps
+++ b/tools/test/bin/onos-check-apps
@@ -14,7 +14,7 @@
 
 # Normalize the expected apps
 apps=${ONOS_APPS:-drivers,openflow}
-(for app in ${apps/,/ }; do echo org.onosproject.$app; done) | sort > $aux.2
+(for app in ${apps//,/ }; do echo org.onosproject.$app; done) | sort > $aux.2
 
 # Check for differences
 diff $aux.1 $aux.2