- Added option to log with suppliers

[yfarjoun]

Description

Please explain the changes you made here. Explain the motivation for making this change. What existing problem does the pull request solve?

Things to think about before submitting:

• [ ] Make sure your changes compile and new tests pass locally.
• [ ] Add new tests or update existing ones:
  • A bug fix should include a test that previously would have failed and passes now.
  • New features should come with new tests that exercise and validate the new functionality.
• [ ] Extended the README / documentation, if necessary
• [ ] Check your code style.
• [ ] Write a clear commit title and message
  • The commit message should describe what changed and is targeted at htsjdk developers
  • Breaking changes should be mentioned in the commit message.

[codecov-io]

Codecov Report

Merging #1406 into master will increase coverage by 0.183%. The diff coverage is 25%.

@@               Coverage Diff               @@
##              master     #1406       +/-   ##
===============================================
+ Coverage     68.123%   68.306%   +0.183%     
- Complexity      8370      8544      +174     
===============================================
  Files            573       573               
  Lines          33943     34379      +436     
  Branches        5668      5807      +139     
===============================================
+ Hits           23123     23483      +360     
- Misses          8631      8698       +67     
- Partials        2189      2198        +9

Impacted Files	Coverage Δ	Complexity Δ
src/main/java/htsjdk/samtools/util/Log.java	51.852% <25%> (-7.165%)	20 <4> (+3)
.../variant/variantcontext/VariantContextBuilder.java	81.992% <0%> (-0.949%)	75% <0%> (+35%)
.../htsjdk/variant/variantcontext/VariantContext.java	79.668% <0%> (+1.664%)	345% <0%> (+108%)	:arrow_up:
src/main/java/htsjdk/variant/vcf/VCFEncoder.java	88.652% <0%> (+2.794%)	96% <0%> (+28%)	:arrow_up: