Add dhcpl2relay to manifest.

Change-Id: Ib84d84e5892dcd52c689cd07cd739ab0f53f4b0f
diff --git a/default.xml b/default.xml
index d3b3ae0..3be30d0 100644
--- a/default.xml
+++ b/default.xml
@@ -16,6 +16,7 @@
 <project path="onos-apps" name="cord-onos-publisher" groups="onos"/>
 <project path="onos-apps/apps/aaa" name="aaa" groups="onos"/>
 <project path="onos-apps/apps/config" name="config" groups="onos"/>
+<project path="onos-apps/apps/dhcpl2relay" name="dhcpl2relay" groups="onos"/>
 <project path="onos-apps/apps/igmp" name="igmp" groups="onos"/>
 <project path="onos-apps/apps/igmpproxy" name="igmpproxy" groups="onos"/>
 <project path="onos-apps/apps/mcast" name="mcast" groups="onos"/>