zdtm.py: Prepare zdtm_test and flavors for mass test start
zdtm.py: Prepare zdtm_test and flavors for mass test start

This is -- add ability to pull more than one binary into
mntns root and ability to start zdtm test with more stuff
in the environment than generated in start method itself.

Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>

KKoukiou/criu-remote,svloyso/criu,efiop/criu,KKoukiou/criu-remote,svloyso/criu,fbocharov/criu,KKoukiou/criu-remote,tych0/criu,svloyso/criu,svloyso/criu,AuthenticEshkinKot/criu,tych0/criu,AuthenticEshkinKot/criu,fbocharov/criu,efiop/criu,tych0/criu,wtf42/criu,AuthenticEshkinKot/criu,efiop/criu,efiop/criu,tych0/criu,efiop/criu,eabatalov/criu,ldu4/criu,fbocharov/criu,tych0/criu,ldu4/criu,svloyso/criu,eabatalov/criu,eabatalov/criu,fbocharov/criu,ldu4/criu,svloyso/criu,ldu4/criu,wtf42/criu,efiop/criu,wtf42/criu,wtf42/criu,wtf42/criu,KKoukiou/criu-remote,eabatalov/criu,fbocharov/criu,eabatalov/criu,AuthenticEshkinKot/criu,wtf42/criu,AuthenticEshkinKot/criu,ldu4/criu,ldu4/criu,KKoukiou/criu-remote,eabatalov/criu,KKoukiou/criu-remote,AuthenticEshkinKot/criu,tych0/criu,fbocharov/criu