hapi-swagger - group docs by tags

[darahayes]

By default the Swagger definitions are grouped by path prefix e.g. /cats /dogs.

Every path except /ping in Udaru is prefixed with /authorization and the result is a giant unorganized list of paths shown in the image:

This PR adds a tiny config change passed to hapi-swagger and the result of that is something like this:

Now this does create duplication e.g. /authorization/organizations is listed under the organizations tag heading and it's also listed under the service tag heading. But really I find most of the tags are pretty useless so I propose we simplify the whole thing down, maybe to a maximum of two tags:

1. A tag that identifies the endpoint by function e.g. organization or users or teams
2. A tag that makes the distinction between public/private or admin/user oriented. @dberesford I can't remember the exact name you put on it but you should get the idea.

What do you think?

[coveralls]

Coverage increased (+0.0007%) to 96.254% when pulling 6dc1f1e on swagger-tags into 87a5c61 on master.

[p16]

@darahayes I'm fine with fewer and more meaningful tags 👍