Update OLT app

Change-Id: I07e7076c23f1df8e2961bcfa0299f67c7457d2a0
diff --git a/apps/olt b/apps/olt
index af2a56e..887a64b 160000
--- a/apps/olt
+++ b/apps/olt
@@ -1 +1 @@
-Subproject commit af2a56e9b4f2591928dee6d94f7975b8fdcbacfb
+Subproject commit 887a64b06952886042900b7160863cdcce69c53c