BaseQualityHistogramAnnotation

[davidbenjamin]

@takutosato Scott Carter requested this annotation to generate base quality histograms.

[codecov]

Codecov Report

Merging #5986 into master will decrease coverage by 0.003%.
The diff coverage is 66.667%.

@@               Coverage Diff               @@
##              master     #5986       +/-   ##
===============================================
- Coverage     86.929%   86.926%   -0.003%     
- Complexity     32721     32730        +9     
===============================================
  Files           2013      2014        +1     
  Lines         151306    151330       +24     
  Branches       16610     16612        +2     
===============================================
+ Hits          131529    131545       +16     
- Misses         13720     13724        +4     
- Partials        6057      6061        +4

Impacted Files	Coverage Δ	Complexity Δ
...ellbender/tools/walkers/annotator/BaseQuality.java	90% <100%> (+1.111%)	10 <1> (+1)	⬆️
.../tools/walkers/annotator/BaseQualityHistogram.java	65.217% <65.217%> (ø)	8 <8> (?)