[Container-tools] atomicapp regresses with Docker 1.10

[Stef Walter]

This is a heads up that docker 1.10 breaks API in various ways. It broke
kubernetes among other things.

But for atomicapp, one of the things it does is prevent an old 'docker'
client from performing certain tasks against a 1.10 'docker' daemon.

For example:

[root at localhost atomicapp]# docker images
Error response from daemon: 400 Bad Request: malformed Host header

This is the result of golang 1.6 changes as well as how docker used to
send its Host header (including the file path).

https://github.com/golang/go/commit/6e11f45ebdbc7b0ee1367c80ea0a0c0ec52d6db5

Here's a bug report for atomicapp:

https://github.com/projectatomic/atomicapp/issues/616

I'm CCing aos-devel since this same issue has come up in several places,
figure it may save people time.

Stef