TestFunctionsForJSON: simplified SET_FIELD tests, using the
testProcWithValidJSON (private) method; namely, in test methods:
testSET_FIELDFunction, testSET_FIELDFunctionWithDotNotation,
testSET_FIELDFunctionWithIndexNotation,
testSET_FIELDFunctionWithDotAndIndexNotation,
testSET_FIELDFunctionWithNumericData.
TestFunctionsForJSON: simplified FIELD tests, using the
testProcWithValidJSON (private) method; namely, in test methods:
testFIELDFunctionWithDotNotation, testFIELDFunctionWithIndexNotation,
testFIELDFunctionWithDotAndIndexNotation,
testFIELDFunctionWithNumericData.