Not failing the build for non critical tests

Change-Id: I8cbb9daefb0226192ce3461b63efd77a50498b30
diff --git a/jjb/pipeline/voltha-tt-physical-functional-tests.groovy b/jjb/pipeline/voltha-tt-physical-functional-tests.groovy
index 1b5cc40..557df9e 100644
--- a/jjb/pipeline/voltha-tt-physical-functional-tests.groovy
+++ b/jjb/pipeline/voltha-tt-physical-functional-tests.groovy
@@ -303,7 +303,8 @@
         outputPath: 'RobotLogs',
         passThreshold: 100,
         reportFileName: '**/report*.html',
-        unstableThreshold: 0
+        unstableThreshold: 0,
+        onlyCritical: true
         ]);
       archiveArtifacts artifacts: '*.log,*.gz,*.tgz'
     }