fix 15.12.3-11-2, 15.12.3-11-14, 15.12.3-6-b-3.js, S15.12.2_A1

fix 15.12.3-11-2, 15.12.3-11-14, 15.12.3-6-b-3.js, S15.12.2_A1
Fixed some JSON.parse error and set exception msg

Fixed some JSON.parse errors and set exception message correctly
fixed unit test 15.12.2-2-3
fixed unit tests 15.12.1.1-g2-2 15.12.1.1-g2-4 15.12.1.1-g1-2 15.12.2-2-6.js 15.12.1.1-g4-1

fixed unit tests 15.12.1.1-g2-2 15.12.1.1-g2-4 15.12.1.1-g1-2
15.12.2-2-6.js 15.12.1.1-g4-1
Finish all JSON Unit tests
Merge pull request #2 from fredericaltorres/master

JSON Changes 2