[infer] Get the list of source files lazily
[infer] Get the list of source files lazily

Summary: The list of source files is only needed in the scheduler process, not in the children workers.

Reviewed By: ngorogiannis

Differential Revision: D21662486

fbshipit-source-id: 9c5be13b5

facebook/infer,jvillard/infer,jvillard/infer,jvillard/infer,jvillard/infer,facebook/infer,facebook/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer