Remove the IterableThreadLocal class and use the one in commons

[kstromhaug]

No description provided.

[codecov-commenter]

Codecov Report

Merging #730 (77fecce) into master (90d97f2) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #730      +/-   ##
==========================================
- Coverage   95.45%   95.45%   -0.01%     
==========================================
  Files         114      114              
  Lines        6668     6667       -1     
  Branches      448      437      -11     
==========================================
- Hits         6365     6364       -1     
  Misses        303      303              

Flag	Coverage Δ
unittests	95.45% <ø> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
...fulcrumgenomics/umi/ConsensusCallingIterator.scala	100.00% <ø> (ø)
.../scala/com/fulcrumgenomics/bam/api/SamWriter.scala	100.00% <0.00%> (ø)

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