Fixing Walk Listeners Issues.

[prashanthjos]

Hi Steve,

We have faced a few issues with walk listeners which was introduced in our earlier PR. The current PR fixes them, making our code more resilient, reliable and maintainable.

Can you please approve the PR and release a version. Please let me know if you have any questions.

Thanks,
Prashanth.

[codecov-io]

Codecov Report

Merging #368 (67d36bf) into master (1783eb5) will decrease coverage by 0.13%.
The diff coverage is 39.02%.

@@             Coverage Diff              @@
##             master     #368      +/-   ##
============================================
- Coverage     69.88%   69.74%   -0.14%     
- Complexity      693      697       +4     
============================================
  Files            80       81       +1     
  Lines          2736     2760      +24     
  Branches        565      556       -9     
============================================
+ Hits           1912     1925      +13     
- Misses          610      621      +11     
  Partials        214      214              

Impacted Files	Coverage Δ	Complexity Δ
...main/java/com/networknt/schema/AllOfValidator.java	73.68% <ø> (+7.01%)	5.00 <0.00> (ø)
...c/main/java/com/networknt/schema/NotValidator.java	91.66% <0.00%> (+22.91%)	4.00 <0.00> (ø)
...in/java/com/networknt/schema/PatternValidator.java	33.33% <0.00%> (+2.08%)	2.00 <0.00> (ø)
...c/main/java/com/networknt/schema/RefValidator.java	71.66% <0.00%> (+3.41%)	13.00 <0.00> (ø)
...main/java/com/networknt/schema/ItemsValidator.java	60.00% <21.62%> (-0.87%)	18.00 <0.00> (ø)
...a/com/networknt/schema/SchemaValidatorsConfig.java	56.89% <30.00%> (-6.37%)	17.00 <1.00> (+1.00)	⬇️
...main/java/com/networknt/schema/ValidatorState.java	70.58% <37.50%> (-29.42%)	6.00 <1.00> (+1.00)	⬇️
...knt/schema/walk/DefaultItemWalkListenerRunner.java	37.50% <37.50%> (ø)	1.00 <1.00> (?)
...main/java/com/networknt/schema/OneOfValidator.java	64.00% <40.00%> (-5.32%)	9.00 <0.00> (+1.00)	⬇️
src/main/java/com/networknt/schema/JsonSchema.java	87.40% <41.66%> (-4.60%)	50.00 <2.00> (+1.00)	⬇️
... and 3 more

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