[Uploader] Switch auth0 from custom to original domain

[rassokhina-e]

Context: We want to remove the custom domain auth.rfcx.org due to cross-domain issues in the browser (safari and chrome security restrictions) and replace it with auth.arbimon.org. On Uploader, we think we can use the original domain (rfcx.eu.auth0.com) so that it works with any custom domain.

Test case:

• Run the Uploader app with the custom domain auth.rfcx.org
• Login
• Change the code to not use the custom domain (use the original domain rfcx.eu.auth0.com instead)
• Run the mobile app again (with the new code)
• Check that you don't need to login, no errors

[rassokhina-e]

[koonchaya]

This will be include with the next version.