Proposal for replacing Upstart with init.d script.

Change-Id: I22ad1faac713bb50f0b7ad3dde132363a6588723
diff --git a/tools/package/bin/onos-service b/tools/package/bin/onos-service
index 5cc2009..d14983e 100755
--- a/tools/package/bin/onos-service
+++ b/tools/package/bin/onos-service
@@ -50,4 +50,4 @@
   fi
 done
 
-exec ${ONOS_HOME}/apache-karaf-$KARAF_VERSION/bin/karaf $KARAF_ARGS
+exec ${ONOS_HOME}/apache-karaf-$KARAF_VERSION/bin/start $KARAF_ARGS