incorrect assignment of "initial_RLOF" state

[celiotine]

Some binaries are being assigned the "initial_RLOF" state late in their evolution, which is causing them to complete their evolution incorrectly. Here is an example (run with PR #404):

Here are the conditions for re-running this binary with the file /projects/b1119/cliotine/dev_general/debugging/params.ini:

sim_kwargs_IF = simprop_kwargs_from_ini(ini_filepath_IF)
sim_prop_IF = SimulationProperties(**sim_kwargs_IF)
sim_prop_IF.load_steps(verbose=True)

star_1 = SingleStar(**{'mass': 9.207256, 'state': 'H-rich_Core_H_burning',
                'natal_kick_array': [91.182965, 0.776432, 1.484747, 4.567527]})
star_2 = SingleStar(**{'mass': 9.093124, 'state': 'H-rich_Core_H_burning',
                'natal_kick_array': [None, None, None, None]})
binary_IF = BinaryStar(star_1, star_2, **{'time': 0.0,  'state': 'detached',  'event': 'ZAMS', 
                        'orbital_period': 16.34274,'eccentricity': 0.0}, properties = sim_prop_IF)
binary_IF.evolve()

Per discussion with @mkruckow and @maxbriel , this seems like an issue with the interpolator, and it is possible we may need to add additional constraints when inferring the star state.