TST: Testing bug in reading json/msgpack from a non-filepath on windows under py3 (GH5874)
closes #5874

@y-p I can't test this directly on py3 on windows...but should work

can you give a run?
 I have a PR almost ready for changing the signature on this and read_msgpack to accept
only url/file_path or file-like/StringIO, what do you think?
Will have to be in 0.14 since it's a breaking change though.

I'm not keen on being the windows tester around here. It looks ok, merge and see if it's green?
 ok....will merge if its green see if it fixes....then go ahead an break the API if needed..sure
