Force purgeOnDisconnection to false when SegmentRouting is active

Change-Id: Ied40026c0c0c712c290966360461c10faaf18ea0
diff --git a/Jenkinsfile-voltha-bal31-build b/Jenkinsfile-voltha-bal31-build
index 4141ad8..25af101 100644
--- a/Jenkinsfile-voltha-bal31-build
+++ b/Jenkinsfile-voltha-bal31-build
@@ -206,6 +206,7 @@
                             sshpass -p karaf ssh -p 30115 karaf@${deployment_config.nodes[0].ip} "log:set TRACE org.opencord.aaa"
                             sshpass -p karaf ssh -p 30115 karaf@${deployment_config.nodes[0].ip} "log:set TRACE org.opencord.olt"
                             curl -sSL --user karaf:karaf -X GET http://${deployment_config.nodes[0].ip}:30120/onos/v1/applications/org.onosproject.segmentrouting | jq '.state' | grep ACTIVE
+                            sshpass -p karaf ssh -p 30115 karaf@${deployment_config.nodes[0].ip} "cfg set org.onosproject.net.flow.impl.FlowRuleManager purgeOnDisconnection false"
                             """
                             return sr_active_out == 0
                         }