Add JsonSyntax pre-commit

Change-Id: I071ccc85f3968f38e2ce8797551c47aaff048d31
Reviewed-on: http://gerrit.causes.com/37957
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>
Clean up JsonSyntax

Minor style fixes.

Change-Id: I1d530d710b18cbddd1750b9f557c6fca2ae195bf
Reviewed-on: http://gerrit.causes.com/37958
Tested-by: jenkins <jenkins@causes.com>
Reviewed-by: Shane da Silva <shane@causes.com>