Parse timer duration buckets obtained through reflection

[objectiser]

Requirement - what kind of business use case are you trying to solve?

PR #63 includes support for defining buckets on Timer and Histogram metric types. The buckets can be statically declared with the metrics and parsed on reflection.

Problem - what in Jaeger blocks you from solving the requirement?

Buckets for histogram metrics are being parsed, but currently not for timer durations.

Proposal - what do you suggest to solve the problem or improve the existing situation?

Parse the timer durations.

Any open questions to address

How should the durations be expressed? For readability it would probably be best as a number + unit (e.g. 1s, 10m)

[yurishkuro]

How should the durations be expressed? For readability it would probably be best as a number + unit (e.g. 1s, 10m)

Yes, Go has a standard way of representing durations as strings.