VOL-2311 Log task start and finish as info and warn

Helps when logging in INFO level, gives just enoug
context.

Also no longer log MDS updates or set-by-create updates
at info

Release 2.3.7

Change-Id: I22535c8b7a51c89778c6a9831139ddd802d95edc
diff --git a/VERSION b/VERSION
index c2417c3..00355e2 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.7-dev
+2.3.7