AMQ-9420 - Don't decrement KahaDB durable sub metrics on duplicate ack

This adds a check in case a duplicate ack is passed to the store to make
sure that the subscription statistics (if enabled) for a durable sub do
not have the metrics decremented a second time

(cherry picked from commit f73cf2aaab026dcddeed7a46b272801a43d95113)
(cherry picked from commit a0b8a1fe55b7b309d754dceaf6cde81967c7f78b)
7 files changed