Fixing javadoc package groupings.

Change-Id: I07807117df835cd746189cc6820cde7c3fee5a9c
diff --git a/docs/internal-apps b/docs/internal-apps
index 71aacd0..c930c05 100644
--- a/docs/internal-apps
+++ b/docs/internal-apps
@@ -27,4 +27,5 @@
 org.onosproject.cord*
 org.onosproject.mcast*
 org.onosproject.mfwd*
+org.onosproject.mlb*
 org.onosproject.igmp.impl