Fix #658 and remove JSON writer/parser

[cprudhom]

Fixes #658.

Changes proposed in this PR:

• [FEATURE] Clean tests' messages #658
• remove specific PropBitIntChanneling propagator, replaced by table constraint

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@04c1a28). Click here to learn what that means.
The diff coverage is 0%.

@@            Coverage Diff            @@
##             master     #664   +/-   ##
=========================================
  Coverage          ?   62.15%           
  Complexity        ?     9852           
=========================================
  Files             ?      634           
  Lines             ?    40152           
  Branches          ?     7672           
=========================================
  Hits              ?    24958           
  Misses            ?    12911           
  Partials          ?     2283

Impacted Files	Coverage Δ	Complexity Δ
...s/src/main/java/org/chocosolver/parser/Parser.java	0% <0%> (ø)	0 <0> (?)

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[cprudhom]

Wow.. I think I should have wait to push last commit...

[lgtm-com]

This pull request fixes 3 alerts when merging 7d91440 into 68854de - view on LGTM.com

fixed alerts:

• 1 for Array index out of bounds
• 1 for Missing space in string literal
• 1 for Constant loop condition