Fix positional arguments for Bounded RVs

[sshekh]

Fixes #3399 . *args from Bound.__call__ was mixing with parameters passed to _ContinuousBounded. i.e

    def __init__(self, distribution, lower, upper,
                 transform='infer', *args, **kwargs):

Here *args was supposed to be arguments for the distribution but dist.init will put positional arguments *args before keyword arguments when calling the constructor for _ContinuousBounded, thus mixing the arguments.

I have changed all calls to the _ContinuousBounded constructor to use only (and all) positional arguments. Also added a test to reproduce the issue

[lucianopaz]

Looks good to me, thanks @sshekh! You should add a line describing this fix in RELEASE-NOTES.md at the end of the maintenance section

[sshekh]

@lucianopaz Updated the RELEASE-NOTES. Thanks!

[ColCarroll]

Thanks @sshekh! This looks good to me -- I'll wait for lucianopaz to merge.

[lucianopaz]

Thanks @sshekh!