(v6.x backport) build: enable cctest to use generated objects#12948

danbev wants to merge 2 commits intonodejs:v6.x-stagingnodejs/node:v6.x-stagingfrom

danbev:v6.x-cctest-refactoringdanbev/node:v6.x-cctest-refactoringCopy head branch name to clipboard