Improving net test tools and scenarios.

Change-Id: I2b53fa7b28e1135d2356ae58d4ee8ac35184d9b8
diff --git a/tools/dev/bash_profile b/tools/dev/bash_profile
index 8752082..b78f5cd 100644
--- a/tools/dev/bash_profile
+++ b/tools/dev/bash_profile
@@ -30,6 +30,8 @@
 # Setup cell enviroment
 export ONOS_CELL=${ONOS_CELL:-local}
 
+export ONOS_SCENARIOS=$ONOS_ROOT/tools/test/scenarios
+
 # Convenience utility to warp to various ONOS source projects
 # e.g. 'o api', 'o dev', 'o'
 function o {