Fixing Javadoc group for REST SB.

Change-Id: I4c5b6990b57fb4aa264c779942edfc81eebc2948
diff --git a/docs/internal-restsb b/docs/internal-restsb
new file mode 100644
index 0000000..971c843
--- /dev/null
+++ b/docs/internal-restsb
@@ -0,0 +1,2 @@
+org.onosproject.protocol.rest*
+org.onosproject.provider.rest*