Fixed #23546 -- Added kwargs support for callproc for oracle

add kwargs or args parameters to callproc method for those backends that support more parameters for callproc method (e.g cx_oracle) 
https://code.djangoproject.com/ticket/23546
already tested on ubuntu 12.04 server(amd64) with oracle XE 11g
Before, you pointed out correctly that this test runs only explicitly for Oracle; now that there is a feature flag, there should be a test checking that the right exception is raised when kparams is used when not supported. I would also like to see tests that run when the feature flag is set, but I realize this is hard (there is no uniform procedure available...). I believe this is what @manfre had in mind when he suggested "more tests".

There's one more point: As far as I'm aware, there are really no tests for callproc other than this one (which really tests something else), and (as noted before) callproc hasn't been documented -- which is a somewhat bigger issue than you set out to solve. I'll raise it on the developers mailing list; the outcome I expect is a separate ticket calling for documentation of callproc and tests for it on all backends -- and maybe completion of the work here should wait for resolution of that issue.