Repeated SXP connection restarting after specific time period

Every 2 hours and 47 minutes all devices that act as Listeners in versions 1 and 4 don't respond to ODL, so each one's SXP connection is restarted.

[Speaker version 4 and the Listener on SXP version 2 remain working OK]

Exception is related to io.netty.handler.timeout.ReadRimeoutException

Problem with time accumulation in timers cisco or sxp-java impl., so the keep-alive message miss the hold-down timer period.