Added onos-cluster-execute-expect as a cluster version of onos-execute-expect + updated stc scenarios for dist primitives to use this for verification

Change-Id: Ife3bde21118ebd21e8abf807070a72ac58341120
diff --git a/tools/test/scenarios/dist-test-seq.xml b/tools/test/scenarios/dist-test-seq.xml
index 97d0480..4b6a162 100644
--- a/tools/test/scenarios/dist-test-seq.xml
+++ b/tools/test/scenarios/dist-test-seq.xml
@@ -64,4 +64,4 @@
                   requires="Sleep-${#}"/>
         </sequential>
     </group>
-</scenario>
\ No newline at end of file
+</scenario>