autotest: removed the set of SYSID_THISMAV

this led to a race condition where some parameters were not loaded as
they were being sent with the wrong system ID
autotest: enable EKF in autotest for plane

try to get it more testing
AntennaTracker: update to build with latest libraries

AntennaTracker has not been maintained as other parts of the system and
libraries have been modernised. This patch at least gets it to the stage where
it compiles and runs in SITL. Also added Tools/autotest/sim_antennatracker.sh
to run in SITL
AntennaTracker: sim_antennatracker.sh does make clean sitl
VARTest: fixed SITL build
CPUInfo: fixed SITL build
build: added AntennaTracker to build_all.sh

ensure it keeps working
autotest: increase timeout for log download
Copter: DO_SET_ROI persists across waypoints

Users should add a DO_SET_ROI command with zero lat, lon and alt to
restore the yaw control to the default control (which is normally
look-at-next-wp)
Copter: use Log_Write_Baro()

this gives the raw pressure and temperature, which is useful for
analysis, plus allows for more accurate log replay
AP_NavEKF : Improvements to staticMode robustness
AP_NavEKF : useAirspeed set automatically
AP_NavEKF : covariance prediction cleanup
AP_NavEKF: fixed detection of airspeed sensor

the get_airspeed() AHRS call can change as the user enables/disables
the airspeed sensor, plus it only gets enabled after the NavEKF
constructor runs.
AP_Math: added more operators to VectorN
AP_AHRS: added get_correct_centrifugal()

used by NavEKF to force static mode
AP_NavEKF: use AHRS get_correct_centrifugal()
AP_InertialSensor: fixed HIL for 400Hz INS
AP_AHRS: added get_armed() and set_armed() calls

will be used by NavEKF to determine static mode
AP_NavEKF: use ahrs->get_armed() for static mode demanded