[ONOS-6901] Fix how the systemTest does not return any result when it forced to quit the test

Change-Id: If93c48d46e8dc2494046b42de21f732775d7f520
diff --git a/TestON/tests/SAMP/SAMPstartTemplate_3node/SAMPstartTemplate_3node.py b/TestON/tests/SAMP/SAMPstartTemplate_3node/SAMPstartTemplate_3node.py
index a276634..553fa8e 100644
--- a/TestON/tests/SAMP/SAMPstartTemplate_3node/SAMPstartTemplate_3node.py
+++ b/TestON/tests/SAMP/SAMPstartTemplate_3node/SAMPstartTemplate_3node.py
@@ -39,7 +39,7 @@
             from tests.dependencies.ONOSSetup import ONOSSetup
         except ImportError:
             main.log.error( "ONOSSetup not found. exiting the test" )
-            main.exit()
+            main.cleanAndExit()
         try:
             main.testSetUp
         except ( NameError, AttributeError ):
@@ -58,7 +58,7 @@
             from tests.dependencies.ONOSSetup import ONOSSetup
         except ImportError:
             main.log.error( "ONOSSetup not found. exiting the test" )
-            main.exit()
+            main.cleanAndExit()
         try:
             main.testSetUp
         except ( NameError, AttributeError ):
@@ -103,7 +103,7 @@
             from tests.dependencies.ONOSSetup import ONOSSetup
         except ImportError:
             main.log.error( "ONOSSetup not found. exiting the test" )
-            main.exit()
+            main.cleanAndExit()
         try:
             main.testSetUp
         except ( NameError, AttributeError ):
@@ -176,8 +176,7 @@
                                  onfail="Failed to load topology" )
         # Exit if topology did not load properly
         if not topoResult:
-            main.cleanup()
-            main.exit()
+            main.cleanAndExit()
 
         main.step( "Assign switches to controllers.")
         assignResult = main.TRUE