remove-jsonparserconfig-ctor - just use withOverwriteDuplicateKey()

[stleary]

Description
Remove overloaded JSONParserConfiguration ctor. Use withOverwriteDuplicateKey() instead

Refactoring
None

Testing done
unit tests

[stleary]

What problem does this code solve?
Removes an unneeded ctor from JSONParserConfiguration

Does the code still compile with Java6?
Yes

Risks
Low

Changes to the API?
Yes, but the ctor was added in a recent commit

Will this require a new release?
No

Should the documentation be updated?
No

Does it break the unit tests?
No, unit tests were updated

Was any code refactored in this commit?
No

Review status
APPROVED - by myself, for immediate release