Fix React template typos

[marquesm91]

Summary of the changes

• Changed word Component to component in <Route path={...} Component={...} /> in App.js
• Applied patches suggested in comment
• Added await in const token = authService.getAccessToken(); to ensure token resolves itself

Addresses #8381 #8380 #8405 #8398

[dnfclas]

All CLA requirements met.

[mkArtak]

Thanks for your effort, @marquesm91.
@javiercn, @ryanbrandenburg this looks good to me.
If you have no concerns with this, let's merge.

[marquesm91]

Thank you @mkArtak! If you guys need an improvement on this template I can open a new PR. I can bump package versions (making possible to use React Hooks in 16.8) and add more real world examples.

[mkArtak]

Thanks @marquesm91.
Let's stick to the issues we plan to do. If you find one you're passionate about, and we have assigned it a milestone, feel free to send a PR. We'll definitely consider it.

[javiercn]

@marquesm91 Thanks for your contribution!