519 add samplingignore logic

[mitchh456]

No description provided.

[quinnmil]

Is this supporting wildcard (/foo/*) controller/job names yet?

[mitchh456]

Is this supporting wildcard (/foo/*) controller/job names yet?

There is prefix matching for endpoints. ignore_uri? and sample_uri? use regex match. I copied it from existing IgnoreUris module. I don't think there's a need for explicitly matching wildcard * or supporting user defined regex.

Do we want regex/prefix match for job names or just explicit? This is something I thought about yesterday. At least in Rails job names are usually something like MyModule::MyJob. Maybe at least module match or something.