fix quadplane FFT reference calculation
re-enable harmonic test
use median for measuring in-flight FFT average as it's much more reliable
relax quadplane filter restriction
recv_match's result is not iterable; it just gives you a single message.
printing the stacktrace when assigning to ex is tradition - we tend to
lose the stack traces otherwise
rebooting sitl is usually required if the context we've just popped had
a reboot in it (usually indicating a reboot-required parameter was set).
So I added a reboot after the context pop.
Tools: unify arm function failure message
Tools: get autodisarm time from parameter for autodisarm test
Tools: disable autodisarm for arm/disarm tests.
Tools: fix interlock channel for heli
Tools: simplify arming_test sub exclusion
Tools: fix empty string in progress
Tools: add back arming test to plane
Tools: allow single test run on Sub
Tools: remove old comments on autotest common
Tools: add vehicle type getter function
Tools: make get_rudder_channel abstract method
Tools: common make get_disarm_delay abstract method
Tools: make set_autodisarm_delay abstract method
Tools: rename set_throttle_zero to zero_throttle and use it
Tools: common.py remove unnecessary exception
Tools: subclass vehicle type
Tools: correct altitude check
Tools: correct tests syntax
Tools: add autotest syntax check on common
Tools: search for syntax mistake on autotest lambda
Tools: put copter in hover trottle to prevent crash
Tools: reboot after baterry failsafe test
Tools: copter takeoff wait_ready_to_arm before arming
Tools: arm copter after land on RTL
Tools: reset copter battery voltage after battery failsafe