[VOL-5434] update voltha-lib-go for recv grpc rsrc exhauseted

Change-Id: I5d690561c79f8d44b0ec60b41d7bcaac8f8ceca1
Signed-off-by: Abhay Kumar <abhayk@radisys.com>
diff --git a/VERSION b/VERSION
index b586739..f65ccbd 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.5.8
+4.5.9