Jn compare bam tag values

[jamesnemesh]

Greatly enhanced CompareBAMTagValues to support analysis where BAM files are inexact - tool now emits reads that are discordant between two data sets, reads that are unique to a data set, and a metrics file that contains the tag values in each data set - either for all tag values, or those that are discordant.

[codecov]

Codecov Report

Attention: Patch coverage is 83.23471% with 85 lines in your changes missing coverage. Please review.

Project coverage is 80.76%. Comparing base (32cf96a) to head (7d1ff5f).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...nstitute/dropseqrna/utils/CompareBAMTagValues.java	78.54%	27 Missing and 35 partials ⚠️
...broadinstitute/dropseqrna/utils/DNACompressor.java	92.22%	3 Missing and 4 partials ⚠️
...ls/alignmentcomparison/QueryNameJointIterator.java	78.57%	4 Missing and 2 partials ⚠️
...utils/readiterators/TagValueFilteringIterator.java	73.33%	2 Missing and 2 partials ⚠️
...adinstitute/dropseqrna/utils/ByteArrayWrapper.java	80.00%	0 Missing and 2 partials ⚠️
...a/utils/readiterators/ReadNameCleanupIterator.java	94.28%	0 Missing and 2 partials ⚠️
.../dropseqrna/utils/DNACompressorVaryingLengths.java	0.00%	1 Missing ⚠️
...rna/utils/readiterators/BAMTagCleanupIterator.java	97.43%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #487      +/-   ##
============================================
+ Coverage     80.69%   80.76%   +0.07%     
- Complexity     4702     4812     +110     
============================================
  Files           358      363       +5     
  Lines         20045    20514     +469     
  Branches       3125     3213      +88     
============================================
+ Hits          16175    16569     +394     
- Misses         2607     2641      +34     
- Partials       1263     1304      +41     

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