[CRIU] [PATCH 0/3] tty: Fix group restore on session leader with inherited tty

[Cyrill Gorcunov]

Hi guys, here are fixes for tty migration. In commit
8eabba3d1c3f5875eaa739717ea33540180a3f29 we've fixed
changing of session leader sid but the appropriate
tty part has been missed to cover. Thus fix it in two
places

 - the job test should test for sid being permanent between c/r
 - do not try to assign a group from grandparent if we have
   a slave peer in new a session, but just inherit terminal
   instead.

This fixes job/java/screen tests.

Please review, comments are highly appreciated.