VOL-2630 Release voltha-simolt-adapter 2.2.3

Change-Id: I66de66a34e84fa18b743fd7fe5e09ed2d36e3b0f
diff --git a/VERSION b/VERSION
index 7dd050c..5859406 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.3-dev
+2.2.3