core: fix broken runner, as process input does not work as expected

[fvilpoix]

The full update I've done for SF4 compatibility relied on Process inputs, which seem to not be the command's arguments. In fact, I don't see what's their usage...

I miss the point because I relied on phpunit tests, which mock the full process system.

I changed the process setup to give it the full command line including args through ENV vars.

AND I tested that in normal usage (outside tests), mediainfo are fetched without error, without Symfony 2, 3 and 4.

This time, it should be ok :D

[mhor]

Thanks for the fix 👍 ! Release as 4.0.2