Override Attitude During ConstantThrustManeuver
This feature is similar to issue #176, but concerns constant thrust instead of impulse maneuver.
The idea is to use a maneuver specific attitude just to compute the
direction of the ΔV and
not for the full spacecraft propagation
(from redmine: issue id 410, created on 2018-03-29, closed on 2018-06-04)