Return generator by its name

		:param name: name of hash-generator

		:return: WHashGeneratorProto class

def generator(name):
		""" Return generator by its name

		:param name: name of hash-generator

		:return: WHashGeneratorProto class
		"""
		name = name.upper()
		if name not in WHash.__hash_map__.keys():
			raise ValueError('Hash generator "%s" not available' % name)
		return WHash.__hash_map__[name]