use route as root span name in hapi instrumentation

[klaemo]

Is your feature request related to a problem? Please describe

Currently the root span name is set by the http instrumentation to a generic name like HTTP GET. Additionally, http.route of the root span is set to the actual http pathname and not the route. So, something like http.route: /events/123 instead of http.route: /events/{eventId}.

This makes traces hard to identify (in Honeycomb in this case):

The actual hapi route is buried somewhat deep in the trace:

Describe the solution you'd like to see

Similarly to the way it's done for Koa (#327) and Express (#176, #273) the root span name should be renamed once the route has been determined and http.route should be set to the actual route at that point.

Describe alternatives you've considered

None

Thank you for your work on OpenTelemetry and all these instrumentations :)

[CptSchnitz]

hi,
I would like to work on this.

[obecny]

hi,
I would like to work on this.

assigned, thx