Type check predictive unit parameters in the Python wrapper

[jklaise]

We should check types when converting the json strings defining predictive unite parameters to python types:

seldon-core/python/seldon_core/microservice.py

Lines 233 to 247 in 361db75

	def parse_parameters(parameters):
	type_dict = {
	"INT": int,
	"FLOAT": float,
	"DOUBLE": float,
	"STRING": str,
	"BOOL": bool
	}
	parsed_parameters = {}
	for param in parameters:
	name = param.get("name")
	value = param.get("value")
	type_ = param.get("type")
	parsed_parameters[name] = type_dict[type_](value)
	return parsed_parameters