Use buck for tests

- use buck instead of maven
- cleanup output when building cluster.json file
- swap the correct nodes in swap nodes test

(cherry picked from commit 4b66b32e5057d84175195a9c5a823e59cb66fa67)

Change-Id: If5981567115fd3acdc353f4a2ee620f5e0a29716
diff --git a/TestON/tests/MISC/SCPFbatchFlowResp/SCPFbatchFlowResp.py b/TestON/tests/MISC/SCPFbatchFlowResp/SCPFbatchFlowResp.py
index d47b317..f1ffb9b 100755
--- a/TestON/tests/MISC/SCPFbatchFlowResp/SCPFbatchFlowResp.py
+++ b/TestON/tests/MISC/SCPFbatchFlowResp/SCPFbatchFlowResp.py
@@ -124,7 +124,7 @@
 
 
             main.step( "Creating ONOS package" )
-            packageResult = main.ONOSbench.onosPackage(opTimeout=240)
+            packageResult = main.ONOSbench.buckBuild()
             stepResult = packageResult
             utilities.assert_equals( expect=main.TRUE,
                                  actual=stepResult,