simulation fails if crop cycle (harvest - sowing) is equal to simulation duration

check how simulator reports error for different parametrization of simulation duration.

ex. for begin at sowing date

rvle_experiment_set_seed is unavailable.error: Simulator /tmp/vle-cf3b-fd7d-8f93-c6cg.vpz throws error 
/!\ error reported: [Phenologie] Error recolte avant semis

ex. for 1 day before sowing and after harvest

rvle_experiment_set_seed is unavailable.error: terminate called after throwing an instance of 'error: char const*'
error: VLE failure: [/usr/local/bin/vle-2.0] (14910) killed by signal 6