[VOL-4455] Compressed voltha-onos-combined logs for bbsim based periodic jobs

Change-Id: I68d39f921fbbd808f3b9c4abe9b51b5a165b69cb
diff --git a/jjb/pipeline/voltha/voltha-2.8/bbsim-tests.groovy b/jjb/pipeline/voltha/voltha-2.8/bbsim-tests.groovy
index 24b2d82..85683db 100755
--- a/jjb/pipeline/voltha/voltha-2.8/bbsim-tests.groovy
+++ b/jjb/pipeline/voltha/voltha-2.8/bbsim-tests.groovy
@@ -117,6 +117,13 @@
     make -C $WORKSPACE/voltha-system-tests ${testTarget} || true
     """
     getPodsInfo("${logsDir}")
+    sh """
+      set +e
+      # collect logs collected in the Robot Framework StartLogging keyword
+      cd ${logsDir}
+      gzip *-combined.log || true
+      rm *-combined.log || true
+    """
   }
 }