core-trace: use ExitCase
to build attributes in Histogram#recordDuration
#761
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There is also a major behavior change:
recordDuration
no longer addscause
attribute by default.To preserve old behavior, users must use
histogram.recordDuration(TimeUnit.SECONDS, Histogram.recordCause)
.Motivation
cause
attribute is opinionated and doesn't go along with most of the semantic conventions.In most conventions, it would be error.type instead.