uavcan: fix actuator groups subcriptions and poll()
Remove airspeed and altitude raw data from TECS log, as we have these quantities already in the system log
Reinstate TECS logging
Add TECS logging
Update arming_state_transition calls

Add new fRunPreArmChecks flag
Add fRunPreArmChecks flag

This is to allow unit tests to be written which do not perform pre-arm
checks
Fix broken arming unit test

Also, update arming_state_transition calls to add new fRunPreArmChecks
flag.
Merge pull request #1255 from PX4/ArmingUTFix

Fix state transition unit tests
UAVCAN ESC mixer: removed the failsafe placeholder, it's no use here
Merge pull request #1258 from PX4/uavcan_fix

uavcan: fix actuator groups subcriptions and poll()
Merge pull request #1254 from PX4/tecs_logging

TECS logging
Merge branch 'master' into smooth_pos_hold
mc_pos_control: manual and offboard control reorganization and cleanup
mc_pos_control: more accurate position setpoint reset, keep attitude setpoint continuous