AC_AttitudeControl: Squash #1149

Job	Run time
build (base)	5m 50s
build-gcc-heli	3m 16s
build (clang)	2m 49s
autotest-heli (sitltest-heli)	18m 26s
autotest (sitltest-copter-tests1a)	15m 4s
autotest (sitltest-copter-tests1b)	18m 49s
autotest (sitltest-copter-tests1c)	14m 25s
autotest (sitltest-copter-tests1d)	13m 39s
autotest (sitltest-copter-tests1e)	16m 1s
autotest (sitltest-copter-tests2a)	15m 51s
autotest (sitltest-copter-tests2b)	31m 54s
	2h 36m 4s

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