[VOL-2895] : Pings fail intermittently after OLT reboot and ONU disable

- There was a possible data corruption due to lock not being applied
  over the entire routine where a new FlowID was being allocated.
  There could be similar corruptions for other PON resource allocations
  as well, so the locks are applied over entire routine where PON resources
  are being managed. This comes at a slightly increased cost of end-to-end
  flow handling transaction time when there are many susbcriber, but
  guarantees sanity of data.

Change-Id: I0644aab4ffd6a636ea9eadccea13e2ed1ccb5d7b
(cherry picked from commit b77ded932e2d0e5802cb04c67203b368fb446410)
diff --git a/VERSION b/VERSION
index 70c0eb4..a4c8060 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.22-dev
+2.3.22