[PATCH 0/4] MR4378: Extend CreateProcess tests for handle inheritance.

[eric pouech (＠epo)]

This serie adds a couple of test for CreateProcess around
std handles inheritance, depending on several options (cui/gui,
use (or no use) of STARTF_USESTDHANDLES, type of handles...).

This requires revisiting the existing tests to allow for more
flexibility in implementing the new tests (and potentially
others if needed).