ONOS-470: Allow ONOS service to be run with customized username

Change-Id: I643b61842577f68c33bee6383638647615528da4

@@ -21,7 +21,7 @@ end script
 
 script
   [ -f /opt/onos/options ] && . /opt/onos/options
-  start-stop-daemon --signal INT --start --chuid sdn \
+  start-stop-daemon --signal INT --start --chuid $ONOS_USER \
     --exec /opt/onos/bin/onos-service -- $ONOS_OPTS \
         >/opt/onos/var/stdout.log 2>/opt/onos/var/stderr.log
 end script

@@ -43,6 +43,9 @@ ssh $remote "
     [ -z "$nostart" ] && sudo cp $ONOS_INSTALL_DIR/debian/onos.conf /etc/init/onos.conf
     echo 'export ONOS_OPTS=debug' > $ONOS_INSTALL_DIR/options
 
+    # Setup correct user to run onos-service
+    echo 'export ONOS_USER="${ONOS_USER:-sdn}"' >> $ONOS_INSTALL_DIR/options
+
     # Remove any previous ON.Lab bits from ~/.m2 repo and re-stage it.
     rm -fr ~/.m2/repository/org/onosproject
     cp -r $ONOS_INSTALL_DIR/$KARAF_DIST/system/org/onosproject ~/.m2/repository/org/onosproject