Modified onos-build to reflect splitting javadoc generation into a separate module.
diff --git a/tools/build/onos-build b/tools/build/onos-build
index cf2ebe4..2f31eeb 100755
--- a/tools/build/onos-build
+++ b/tools/build/onos-build
@@ -6,5 +6,4 @@
 [ ! -d "$ONOS_ROOT" ] && echo "ONOS_ROOT is not defined" >&2 && exit 1
 . $ONOS_ROOT/tools/build/envDefaults
 
-cd $ONOS_ROOT
-mvn clean install && mvn javadoc:aggregate
+cd $ONOS_ROOT && mvn clean install && cd docs && mvn javadoc:aggregate