TestFunctionsForJSON: added new test method
testSET_FIELDFunctionWithMisplacedDotOrIndexNotation, which tests the
SET_FIELD (JSON) function using “misplaced” arguments like ‘foo.bar’ or
‘foo[0]’, where foo is a previously defined primitive field, or array
(for the ‘.bar’ case), or object (for the ‘[0]’ case).