jenkins: add a script to execute tests on overlayfs
jenkins: add a script to execute tests on overlayfs

Here are all tests which pass now

And I created an issue to investigate fails of other tests:
https://github.com/xemul/criu/issues/136

Signed-off-by: Andrew Vagin <74c05afa918858348d6db8037d82fa8124870113@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@virtuozzo.com>

eabatalov/criu,KKoukiou/criu-remote,eabatalov/criu,eabatalov/criu,efiop/criu,efiop/criu,eabatalov/criu,eabatalov/criu,efiop/criu,eabatalov/criu,AuthenticEshkinKot/criu,AuthenticEshkinKot/criu,AuthenticEshkinKot/criu,AuthenticEshkinKot/criu,efiop/criu,AuthenticEshkinKot/criu,efiop/criu,AuthenticEshkinKot/criu,KKoukiou/criu-remote,KKoukiou/criu-remote,efiop/criu,KKoukiou/criu-remote,KKoukiou/criu-remote,KKoukiou/criu-remote