Archiving all Robot logs (including IGMP)

Change-Id: I745af282a8323696f2311b85e5c44b1a48eb5ece
diff --git a/jjb/pipeline/voltha/master/voltha-scale-test.groovy b/jjb/pipeline/voltha/master/voltha-scale-test.groovy
index 1e24b1b..7e05739 100644
--- a/jjb/pipeline/voltha/master/voltha-scale-test.groovy
+++ b/jjb/pipeline/voltha/master/voltha-scale-test.groovy
@@ -731,7 +731,7 @@
         python tests/scale/sizing.py -o $WORKSPACE/plots || true
       fi
       '''
-      archiveArtifacts artifacts: 'execution-time.txt,logs/*,logs/pprof/*,RobotLogs/*,plots/*,etcd-metrics/*'
+      archiveArtifacts artifacts: 'execution-time.txt,logs/*,logs/pprof/*,RobotLogs/**/*,plots/*,etcd-metrics/*'
     }
   }
 }