Bump version to 2.3.0
Include version and git hash information in openolt deb package name.

Change-Id: Ia59db34a0993bcfcade64807c623754ca284d766
diff --git a/VERSION b/VERSION
index 04b10b4..276cbf9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.1.7
+2.3.0