Md5CalculatingOutputStream support for Path

[magicDGS]

Description

Very simple patch to allow writing the MD5 digest file to a path.

Checklist

• Code compiles correctly
• New tests covering changes and new functionality
• All tests passing
• Extended the README / documentation, if necessary
• Is not backward compatible (breaks binary or source compatibility)

[codecov-io]

Codecov Report

Merging #814 into master will decrease coverage by -0.014%.
The diff coverage is 100%.

@@               Coverage Diff               @@
##              master      #814       +/-   ##
===============================================
- Coverage     64.867%   64.854%   -0.014%     
+ Complexity      7175      7173        -2     
===============================================
  Files            526       526               
  Lines          31731     31733        +2     
  Branches        5424      5424               
===============================================
- Hits           20583     20580        -3     
- Misses          9000      9002        +2     
- Partials        2148      2151        +3

Impacted Files	Coverage Δ	Complexity Δ
...sjdk/samtools/util/Md5CalculatingOutputStream.java	71.795% <100%> (-6.584%)	8 <1> (ø)
...main/java/htsjdk/samtools/SAMRecordSetBuilder.java	88.306% <0%> (-0.806%)	62% <0%> (-2%)

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[magicDGS]

This is a very simple patch to be able to use the MD5 calculation wrapper with a Path. Can you review, @lbergelson? I'm asking you because you also took #810 (path support for other classes).

[lbergelson]

@magicDGS 👍

[magicDGS]

Thanks!