Refine test-runner handling of valid/invalid dirs.
Refine test-runner handling of valid/invalid dirs.

--HG--
extra : transplant_source : %1C%28W%AB%7B9xOV%B0%26C%3A%04%16%15%1A%19%25%CD

tripu/validator,sammuelyee/validator,sammuelyee/validator,takenspc/validator,takenspc/validator,takenspc/validator,tripu/validator,tripu/validator,YOTOV-LIMITED/validator,YOTOV-LIMITED/validator,validator/validator,sammuelyee/validator,validator/validator,tripu/validator,sammuelyee/validator,validator/validator,tripu/validator,YOTOV-LIMITED/validator,takenspc/validator,validator/validator,YOTOV-LIMITED/validator,takenspc/validator,sammuelyee/validator,YOTOV-LIMITED/validator,validator/validator