Avoid removing/checking ssh keys when connecting to ONOS

Change-Id: Ia2f3f9d95a12dde6986ef89ea1f1775836fe40ea
diff --git a/Jenkinsfile-voltha-build b/Jenkinsfile-voltha-build
index 925e70e..e57521c 100644
--- a/Jenkinsfile-voltha-build
+++ b/Jenkinsfile-voltha-build
@@ -300,16 +300,14 @@
                     timeout(1) {
                         waitUntil {
                             sr_active_out = sh returnStatus: true, script: """
-                            ssh-keygen -R [${deployment_config.nodes[0].ip}]:30115
-                            ssh-keyscan -p 30115 -H ${deployment_config.nodes[0].ip} >> ~/.ssh/known_hosts
-                            sshpass -p karaf ssh -p 30115 karaf@${deployment_config.nodes[0].ip} "log:set TRACE org.opencord.dhcpl2relay"
-                            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"
-                            sshpass -p karaf ssh -p 30115 karaf@${deployment_config.nodes[0].ip} "log:set DEBUG org.onosproject.net.flowobjective.impl.FlowObjectiveManager"
-                            sshpass -p karaf ssh -p 30115 karaf@${deployment_config.nodes[0].ip} "log:set DEBUG org.onosproject.net.flowobjective.impl.InOrderFlowObjectiveManager"
+                            sshpass -p karaf ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -p 30115 karaf@${deployment_config.nodes[0].ip} "log:set TRACE org.opencord.dhcpl2relay"
+                            sshpass -p karaf ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -p 30115 karaf@${deployment_config.nodes[0].ip} "log:set TRACE org.opencord.aaa"
+                            sshpass -p karaf ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -p 30115 karaf@${deployment_config.nodes[0].ip} "log:set TRACE org.opencord.olt"
+                            sshpass -p karaf ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -p 30115 karaf@${deployment_config.nodes[0].ip} "log:set DEBUG org.onosproject.net.flowobjective.impl.FlowObjectiveManager"
+                            sshpass -p karaf ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -p 30115 karaf@${deployment_config.nodes[0].ip} "log:set DEBUG org.onosproject.net.flowobjective.impl.InOrderFlowObjectiveManager"
                             curl -sSL --user karaf:karaf -X GET http://${deployment_config.nodes[0].ip}:30120/onos/v1/applications/org.onosproject.segmentrouting | jq '.state' | grep ACTIVE
-                            sshpass -p karaf ssh -p 30115 karaf@${deployment_config.nodes[0].ip} "cfg set org.onosproject.net.flow.impl.FlowRuleManager purgeOnDisconnection false"
-                            sshpass -p karaf ssh -p 30115 karaf@${deployment_config.nodes[0].ip} "cfg set org.onosproject.net.meter.impl.MeterManager purgeOnDisconnection false"
+                            sshpass -p karaf ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -p 30115 karaf@${deployment_config.nodes[0].ip} "cfg set org.onosproject.net.flow.impl.FlowRuleManager purgeOnDisconnection false"
+                            sshpass -p karaf ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -p 30115 karaf@${deployment_config.nodes[0].ip} "cfg set org.onosproject.net.meter.impl.MeterManager purgeOnDisconnection false"
                             """
                             return sr_active_out == 0
                         }