Fix for Issue#343

[muraliQlogic]

Fixes #343

• Tests and linter pass
• Code coverage does not decrease (if any source code was changed)
• Appropriate docs were updated (if necessary)

[sduskis]

@muraliQlogic: The requirement is to have a check that requires a family with a qualifier. The qualifier could be the empty string. This PR doesn't look right.

[sduskis]

Please add a test to ensure that an empty qualifier passes the chunk transformer. Please revert everything else.

[sduskis]

fam":"" is fine, but "fam":[null] is not ok. I believe the if statement checks for "fam":[null] rather than "fam":"". We should add a unit test to confirm that. @muraliQlogic, can you please change the the chunktransformer.js test for those requirements?

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@a8f156d). Click here to learn what that means.
The diff coverage is 100%.

@@           Coverage Diff           @@
##             master   #353   +/-   ##
=======================================
  Coverage          ?   100%           
=======================================
  Files             ?     10           
  Lines             ?   1287           
  Branches          ?      0           
=======================================
  Hits              ?   1287           
  Misses            ?      0           
  Partials          ?      0

Impacted Files	Coverage Δ
src/chunktransformer.js	100% <100%> (ø)

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[muraliQlogic]

@sduskis : I modified if condition to check for null or undefined qualifier.

[sduskis]

@muraliQlogic: Does ChunkTransformer. validateNewRow also need the check for null or undefined?