xr.py check_config() doing a wrong type check

[oranima]

check_config() function in set_json() under xr.py contains some bugs.
see below what should be changed

    def check_configs(name, configs):

[-] if isinstance(name, string_types):
[+] if isinstance(configs, string_types):
...
[-] elif isinstance(name, dict):
[+] elif isinstance(configs, dict):

name is indeed always a string as the function is called with
lines 188,189
updates = create_updates("update_json_configs", update_json_configs)
replaces = create_updates("replace_json_configs", replace_json_configs)
line 155
configs = check_configs(name, configs)

The test should be checked against configs which it the variable containing the actual config and which should be either a string, a dict or an iterable