tracing: Add trace sampling configuration to the route, to override the route level#6986
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mattklein123 merged 9 commits intoenvoyproxy:masterfrom May 28, 2019
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Description: Enable trace sampling to be overridden at the route level.
Risk Level: low
Testing: added unit tests and manually updated examples/jaeger-tracing to try it out.
Docs Changes: Assume model docs are autogenerated. Not sure if any other docs need to be changed.
Release Notes:
Sampling associated with individual routes can now be overridden to define route specific values.
Fixes #6915