Waypoints are cyclically re-requested by copter on SITL

@Arne-W wrote:

Hi guys,
when connecting the current master APM Planner to a SITL copter 3.5-rc2 it transfers all stored waypoints to the APM Planner - so far so good. But after the APM Planner sent the "waypoint_ack" message the SITL Copter cyclically tries to transmit all waypoints again round about every 4 seconds. It does not send a "waypoint_count" or something else only "waypoint" messages for all waypoints stored in the copter. (SITL log shows "re-requesting WPs [0, 1, 2, 3, 4]")
The APM Planner ignores those messages but the log gets flooded. All other features (setting/reading parameters, graphing... ) work as normal.
This behaviour continues until you read the waypoint list directly through MAVProxy->Mission->List. (SITL log shows 16 0 -35.3632621765 149.1652374268 584.090027 p1=0.0 p2=0.0 p3=0.0 p4=0.0 cur=0 auto=1
16 3 -35.3627281189 149.1631317139 20.000000 p1=0.0 p2=0.0 p3=0.0 p4=0.0 cur=0 auto=1
16 3 -35.3635749817 149.1634216309 20.000000 p1=0.0 p2=0.0 p3=0.0 p4=0.0 cur=0 auto=1
16 3 -35.3637351990 149.1646575928 20.000000 p1=0.0 p2=0.0 p3=0.0 p4=0.0 cur=0 auto=1
21 3 -35.3625335693 149.1650695801 20.000000 p1=0.0 p2=0.0 p3=0.0 p4=0.0 cur=0 auto=1
Saved 5 waypoints to test/logs/2017-03-30/flight6/way.txt
Saved waypoints to test/logs/2017-03-30/flight6/way.txt
) After that the retransmission stops regardless how often the wapoint list is fetched by APM Planner.

Seems to be a bug - not sure if its in APMCopter or in the SITL.

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