Improve exampleMocoTrack.py using setWeightForControlPattern

[mrrezaie]

Hi, I think these parts of the exampleMocoTrack.py code which increase the weight of ground-pelvis coordinate actuators can be improved

opensim-core/Bindings/Python/examples/Moco/example3DWalking/exampleMocoTrack.py

Lines 158 to 164 in accddd7

	model = modelProcessor.process()
	model.initSystem()
	forceSet = model.getForceSet()
	for i in range(forceSet.getSize()):
	forcePath = forceSet.get(i).getAbsolutePathString()
	if 'pelvis' in str(forcePath):
	effort.setWeightForControl(forcePath, 10)

opensim-core/Bindings/Python/examples/Moco/example3DWalking/exampleMocoTrack.py

Lines 222 to 229 in accddd7

	controlsWeightSet = osim.MocoWeightSet()
	model = modelProcessor.process()
	model.initSystem()
	forceSet = model.getForceSet()
	for i in range(forceSet.getSize()):
	forcePath = forceSet.get(i).getAbsolutePathString()
	if 'pelvis' in str(forcePath):
	controlsWeightSet.cloneAndAppend(osim.MocoWeight(forcePath, 10))

by using MocoControlGoal::setWeightForControlPattern():

effort.setWeightForControlPattern('.*pelvis', 10)

Thank you.