Add test cases for OP_SUBSTR_LAZY
Add test cases for OP_SUBSTR_LAZY

Signed-off-by: Steven Roose <4068f0880b399410602d694b3cc711c8a8f4727e@stevenroose.org>

ElementsProject/elements,ElementsProject/elements,ElementsProject/elements,ElementsProject/elements,ElementsProject/elements,ElementsProject/elements