Added blank lines and fixed run_testing

src/run_testing.py

@@ -1,5 +1,5 @@
-import EasyGA
 import random
+import EasyGA
 
 # Create the Genetic algorithm
 ga = EasyGA.GA()
@@ -8,7 +8,8 @@ ga.population_size = 100
 ga.chromosome_length = 10
 ga.generation_goal =  100
 ga.gene_impl = [random.randint,1,10]
+ga.parent_selection_impl = EasyGA.Parent_Selection.Roulette.roulette_selection
 
 ga.evolve()
 
-ga.population.print_all()
+ga.population.print_all()