[processor/resourcedetectionprocessor] handle partial presence of heroku metadata #25059
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Description:
Currently, heroku metadata is only collected if the
HEROKU_DYNO_ID
environment variable is present.It turns that under some circumstances this environment variable may be missing, but the rest of the variables may still be present. We collect what we can and offer to log at debug level if some or all metadata is missing to avoid cluttering logs.
Testing:
Unit tests.
Documentation:
No changes.