[VOL-2364] handle sub-sequent onuDiscoveryIndication

If ChildDeviceDetected times out then the device never receives the
"enable" call. With this patch we are allowing the device to send a new
discovery indication to retry the process (the OpenOlt agent keeps
sending discovery until an "enable" call is received for that device)

Change-Id: I6a2f5d5e9b0a001361bdca1feb14ca22cf092138
diff --git a/VERSION b/VERSION
index 2bf1c1c..4074260 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.1
+2.3.2-dev