[Backport to 2.x] remote inference: escape parameter if not valid json

[ylwu-amzn]

Description

Backport PR #1174 to 2.x

Issues Resolved

[List any issues this PR will resolve]

Check List

• New functionality includes testing.
  • All tests pass
• New functionality has been documented.
  • New functionality has javadoc added
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

Merging #1176 (bc29a08) into 2.x (5b4bd51) will increase coverage by 0.01%.
The diff coverage is 87.50%.

@@             Coverage Diff              @@
##                2.x    #1176      +/-   ##
============================================
+ Coverage     78.94%   78.96%   +0.01%     
- Complexity     2118     2121       +3     
============================================
  Files           167      167              
  Lines          8633     8641       +8     
  Branches        869      870       +1     
============================================
+ Hits           6815     6823       +8     
+ Misses         1425     1423       -2     
- Partials        393      395       +2     

Flag	Coverage Δ
ml-commons	78.96% <87.50%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
...ch/ml/engine/algorithms/remote/ConnectorUtils.java	70.83% <87.50%> (+2.08%)	⬆️

... and 1 file with indirect coverage changes