Fix Datadog traces for health

[klouvas]

Based on the configuration defined in orka for datadog metrics there should NOT be any traces for health endpoint in datadog. Based on the career pages datadog dashboard we see that some requests are traced.

[nikostoulas]

It seems that we have a typo in the configuration as seen here: https://docs.datadoghq.com/tracing/setup_overview/custom_instrumentation/nodejs?tab=locally

Datadog expects blocklist not blacklist.

[nikostoulas]

Care to fix this @klouvas ?

[klouvas]

i checked about that and in version dd-trace@0.30.5 that is used in orka the blacklist option is deprecated but it's not removed.
https://github.com/DataDog/dd-trace-js/blob/v0.30.5/packages/dd-trace/src/plugins/util/urlfilter.js#L14

[nikostoulas]

That's weird then. Possibly needs some debugging to figure out what is happening.