Added ability for commands to post properties to be used as params of other commands.

Starting to add monitor GUI.

Change-Id: I9fcf1568d0de27dfd1c19e875f8646fd731a1dfa
diff --git a/tools/test/scenarios/net-pingall.xml b/tools/test/scenarios/net-pingall.xml
index babdfa6..df1ae1f 100644
--- a/tools/test/scenarios/net-pingall.xml
+++ b/tools/test/scenarios/net-pingall.xml
@@ -28,7 +28,7 @@
         <step name="Check-Summary-For-Hosts" requires="~Ping-All-And-Verify"
               exec="onos-check-summary ${OC1} [0-9]* 25 140 25"/>
 
-        <step name="Config-Topo" requires="Check-Summary-For-Hosts"
+        <step name="Config-Topo" requires="~Check-Summary-For-Hosts"
               exec="onos-topo-cfg ${OC1} ${ONOS_ROOT}/tools/test/topos/attmpls.json"/>
     </group>
 </scenario>
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