pycriu: images: merge payload field into entry and add extra field to entry if needed
pycriu: images: merge payload field into entry and add extra field to entry if needed

Before:
{
    "magic" : "FOO",
    "entries" : [
        {
            "payload" : {
                "foo" : "bar",
                "bar" : "foo"
            },
            "extra" : "abc"
        },
        {
            "payload" : {
            "foo" : "bar",
            "bar" : "foo"
            },
            "extra" : "abc"
        }
    ]
}

After:
{
    "magic" : "FOO",
    "entries" : [
        {
            "foo" : "bar",
            "bar" : "foo"
            "extra" : "abc"
        },
        {
            "foo" : "bar",
            "bar" : "foo"
            "extra" : "abc"
        }
    ]
}

We don't have any fields named "extra" in our pb msgs and it is
not likely that we will ever have one, so there is no reason to
worry about that.

Signed-off-by: Ruslan Kuprieiev <f6538312ce47017d734b1357aabc970ebf896e32@gmail.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@parallels.com>

rentzsch/criu,AuthenticEshkinKot/criu,gonkulator/criu,marcosnils/criu,marcosnils/criu,eabatalov/criu,LK4D4/criu,fbocharov/criu,AuthenticEshkinKot/criu,ldu4/criu,biddyweb/criu,tych0/criu,AuthenticEshkinKot/criu,LK4D4/criu,fbocharov/criu,tych0/criu,tych0/criu,rentzsch/criu,ldu4/criu,KKoukiou/criu-remote,ldu4/criu,svloyso/criu,tych0/criu,wtf42/criu,marcosnils/criu,fbocharov/criu,svloyso/criu,sdgdsffdsfff/criu,svloyso/criu,AuthenticEshkinKot/criu,gonkulator/criu,sdgdsffdsfff/criu,marcosnils/criu,LK4D4/criu,KKoukiou/criu-remote,rentzsch/criu,wtf42/criu,AuthenticEshkinKot/criu,fbocharov/criu,eabatalov/criu,biddyweb/criu,ldu4/criu,svloyso/criu,biddyweb/criu,eabatalov/criu,sdgdsffdsfff/criu,efiop/criu,gablg1/criu,gablg1/criu,tych0/criu,eabatalov/criu,efiop/criu,biddyweb/criu,gablg1/criu,KKoukiou/criu-remote,marcosnils/criu,biddyweb/criu,LK4D4/criu,AuthenticEshkinKot/criu,gablg1/criu,fbocharov/criu,svloyso/criu,eabatalov/criu,rentzsch/criu,gablg1/criu,rentzsch/criu,svloyso/criu,KKoukiou/criu-remote,gonkulator/criu,LK4D4/criu,tych0/criu,gonkulator/criu,rentzsch/criu,gablg1/criu,marcosnils/criu,KKoukiou/criu-remote,efiop/criu,sdgdsffdsfff/criu,gonkulator/criu,sdgdsffdsfff/criu,wtf42/criu,efiop/criu,wtf42/criu,wtf42/criu,efiop/criu,eabatalov/criu,wtf42/criu,ldu4/criu,efiop/criu,LK4D4/criu,gonkulator/criu,biddyweb/criu,ldu4/criu,KKoukiou/criu-remote,fbocharov/criu,sdgdsffdsfff/criu