A few small fixes

[Kenneth-T-Moore]

Summary

1. Removed the "use_actual_takeoff_mass" option, since it isn't used anywhere in the code.
2. Renamed some inconsistently named aviary variables with hieararchy name CONTROL_MASS = but name string 'ctrl_mass'".
3. Fixed a bug where throttle was incorrectly given a scaler default value in the energy phase.

Related Issues

• Resolves
  Rename surface_ctrl_mass to surface_control_mass #776
  Phase_info flag use_actual_takeoff_mass doesn't appear to do anything #724

Backwards incompatibilities

These variables:

    SURFACE_CONTROL_MASS = 'aircraft:wing:surface_ctrl_mass'
    SURFACE_CONTROL_MASS_COEFFICIENT = 'aircraft:wing:surface_ctrl_mass_coefficient'
    SURFACE_CONTROL_MASS_SCALER = 'aircraft:wing:surface_ctrl_mass_scaler'

have become:

    SURFACE_CONTROL_MASS = 'aircraft:wing:surface_control_mass'
    SURFACE_CONTROL_MASS_COEFFICIENT = 'aircraft:wing:surface_control_mass_coefficient'
    SURFACE_CONTROL_MASS_SCALER = 'aircraft:wing:surface_control_mass_scaler'

New Dependencies

None