Inconsistent function signature of NDarray.randn

[ChaiBapchya]

Description

NDArray.randn function signature
def rand (*shape, **kwargs):
is incorrect and inconsistent with rest of the signatures in Random Number Generator NDArray API

a. Rest of the parameters - loc, scale, shape, dtype, ctx, out need to be included
b. *shape has to be replaced by shape
c. Why is another level of abstraction added by putting everything in **kwargs and then popping it up. If that's required, why not for others?

[anirudhacharya]

can you please add links and references in the above issue description

[piyushghai]

Thank you for reporting this issue @ChaiBapchya
@mxnet-label-bot [NDArray]

[ChaiBapchya]

Yup, I'm working on another PR that will have fix for this too.