[VOL-2356]core log_level command line argument should take log level names not int value

- StringToLogLevel method returns two arguments.

Change-Id: I83d20d645fa63363e71265b163273414f14688a7
diff --git a/VERSION b/VERSION
index c2417c3..00355e2 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.7-dev
+2.3.7