fix(core): Remove duplicate angular interceptor

[pgrodrigues]

Remove the interceptor defined in the users module
Update the interceptor defined in the core module
Update the respective test

Fixes #1096

[mleanos]

LGTM.

[mleanos]

@codydaig @lirantal Do we want to leave the file users.client.config, as a placeholder, but have it empty? Like what we're doing with articles.server.config.

[pgrodrigues]

I removed it since there was no js logic to be added to the user config, but I can bring the file back if needed.

[codydaig]

@mleanos IMO, placeholder files should be in the generator, not laying around in this repo.

[ilanbiala]

No strong feelings about it, so I'd say let's just keep the repo uncluttered.

[codydaig]

LGTM

[rhutchison]

LGTM

[codydaig]

Thanks @pgrodrigues.

Good to see your comments again @rhutchison!