Clarify $ONOS_PROPS and restore missing $JMX_PORT
diff --git a/start-onos.sh b/start-onos.sh
index 1d52a2b..a9d4d64 100755
--- a/start-onos.sh
+++ b/start-onos.sh
@@ -11,7 +11,8 @@
 PCAP_LOG="${LOGDIR}/onos.`hostname`.pcap"
 LOGS="$ONOS_LOG $PCAP_LOG"
 
-ONOS_PROPS="${ONOS_PROPS:-./conf/onos.properties}"
+ONOS_PROPS=${ONOS_PROPS:-${ONOS_HOME}/conf/onos.properties}
+JMX_PORT=${JMX_PORT:-7189}
 
 # Set JVM options
 JVM_OPTS="${JVM_OPTS:-}"