Adds corrections to enabling fence using aux function.
Correctly test fences statically. Only uploaded fences can be checked using a fence file, so we check those first. Then we add steps to check tin can, max and minm all set the fence as present, as expected.
Plane will support MAV_PROTOCOL_CAPABILITY_MISSION_FENCE, so we assert that it does support it.
To test ceiling and floor, leverage some existing functions for takeoff, change altitude and land. Check for respective breach.
Add a floor breach check to copter.
James O'Shannessy