Possible redundant util function

[rdimaio]

It seems like render_json_list is exactly the same as render_json.

rucio/lib/rucio/common/utils.py

Lines 614 to 623 in bed3f05

	def render_json(**data):
	""" JSON render function
	"""
	return json.dumps(data, cls=APIEncoder)
	def render_json_list(list_):
	""" JSON render function for list
	"""
	return json.dumps(list_, cls=APIEncoder)

Is render_json_list actually needed? If not, it should be removed.