feat(data-point): implement opentracing interface

[acatl]

What:

closes #414

This Pr must be merged after #417

Why:

Opentrace was incorrectly implemented before this.

How:

Checklist:

• Has Breaking changes
• Documentation
• Tests
• Ready to be merged - after feat(data-point): create tracing api #417
• Added username to all-contributors list

[codecov]

Codecov Report

Merging #418 into canary will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           canary   #418   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          27     28    +1     
  Lines         457    469   +12     
  Branches       70     71    +1     
=====================================
+ Hits          457    469   +12

Impacted Files	Coverage Δ
...ages/data-point-tracers/opentracing/opentracing.js	100% <100%> (ø)

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