[VOL-3548] Differentiate between OLT gRPC channel
disconnect and device reboot

Change-Id: I3df869575f21e6319919b2e540d85d47fe71dc74
diff --git a/VERSION b/VERSION
index 80c4caf..af253c1 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.0.14
+4.0.15