Using golang:1.13.9-alpine as base container for the gocover-cobertura tool (it requires Golang to be installed)

Change-Id: Ie09642e350c579b4f759da4adad0ce766ec3673d
diff --git a/VERSION b/VERSION
index 276cbf9..2bf1c1c 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.0
+2.3.1