fix: erlang elixir samples

[Graborg]

Before:
should_sample only takes into account if the keys matched
config %{"http.target": "/healthcheck"} and a span %{"http.target": "/something_else"} would match and the span would be dropped.
After:
should_sample compares both keys and values
%{"http.target": "/healthcheck"} and a span %{"http.target": "/something_else"} => {:record_and_sample, [], []}
%{"http.target": "/healthcheck"} and a span %{"http.target": "/healthcheck"} => {:drop, [], []}

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: Graborg / name: Mikael (5d6482e, 0fd646d, 41d2f32, ba9fc85, 8f40bcc)
• ✅ login: cartermp / name: Phillip Carter (7c268a3)

[theletterf]

Summoning @open-telemetry/erlang-approvers

[tsloughter]

@theletterf thanks!

@Graborg can you explain what was wrong/fixed?

[Graborg]

Hi! Sure! Before the function only took into account the that the keys matched: i.e if
config %{"http.target": "/healthcheck"} and a span %{"http.target": "/something_else"}; the span would be dropped. It now looks at the value as well.

[tsloughter]

Oooh, hah! Thanks :)

Might be simpler code to just convert to a list and do a sets:is_disjoint.

[Graborg]

Sure! Something like this maybe?

[tsloughter]

Perfect 👍