fix BearerStrategy.call _extend leaving out req. fixes #112

[dhodgin]

Since opts is initialized at the top of the function to either an empty object or the options variable and the code afterwards assumes it will be an object and modifies its properties we can remove the need to extend the opts into an empty object in the BearerStrategy.call and just combine opts with passReqToCallback

util._extend does not accept more than 2 arguments so currently passReqToCallback is dropped and not forced true unless you set it in your config of your own app

see: https://github.com/defunctzombie/node-util/blob/master/util.js#L572

[msftclas]

Hi @dhodgin, I'm your friendly neighborhood Microsoft Pull Request Bot (You can call me MSBOT). Thanks for your contribution!

This seems like a small (but important) contribution, so no Contribution License Agreement is required at this point. Real humans will now evaluate your PR.

TTYL, MSBOT;

[dhodgin]

I just realized i had made this PR against master not dev. Will you guys take care of this to include it in dev or do you want me to do something?

[yarandoo]

Hi @dhodgin thanks for investigating this and your fix!
I am new to this repo but it seems your PR fixed the mentioned issue, though documentation seems now outdated and some conditional logic relying in "passReqToCallback" looks like not necessary anymore as this parameter is forced to be always true. Please see #141. I am happy to fix those.