Zipping the combined error-report.log file to disk overflow

Change-Id: Ia1e644b7343e28f566248ebfe7e768ed7b12a573
diff --git a/jjb/pipeline/voltha-tt-physical-functional-tests.groovy b/jjb/pipeline/voltha-tt-physical-functional-tests.groovy
index 0118b3c..15462bf 100644
--- a/jjb/pipeline/voltha-tt-physical-functional-tests.groovy
+++ b/jjb/pipeline/voltha-tt-physical-functional-tests.groovy
@@ -78,7 +78,7 @@
         chmod 755 $WORKSPACE/bin/voltctl
         voltctl version --clientonly
 
-        
+
         # Default kind-voltha config doesn't work on ONF demo pod for accessing kvstore.
         # The issue is that the mgmt node is also one of the k8s nodes and so port forwarding doesn't work.
         # We should change this. In the meantime here is a workaround.
@@ -156,6 +156,8 @@
       extract_errors_python voltha-ofagent >> $WORKSPACE/error-report.log
       extract_errors_python onos >> $WORKSPACE/error-report.log
 
+      gzip error-report.log || true
+
       cd $WORKSPACE/voltha/kind-voltha/scripts/logger/combined/
       tar czf $WORKSPACE/container-logs.tgz *