Rewrite adjust_worker_number_by_load from satellite.py

Please have a look to the code and the self.max_q_size. I "randomly" put a value but I think it may not be the good one.

I also made a pep8 clean and pylint clean in this file : 
   * Remove useless "\"
   * Comment unused import / variable (just uncomment it if it breaks something)
   * Lines <= 100
   * Visual indent

The main thing to look at is  get_max_q_len() and  adjust_worker_number_by_load()

NOTE : The min_workers and max_workers are now PER MODULE and not the sum of all workers.