On SSHAdapter, close channel after getting the response (#2248)

[arcenik]

This is a fix proposal for #2248.

It adds a build_response function on the SSHAdapter object to close the ssh channel oncy the response is received.

Is there a more elegant way to make requests do it ?

The versions are

• python-docker 3.7.0-1
• docker 18.09.2-ce (on Archlinux)
• Python 3.7.2

[GordonTheTurtle]

Please sign your commits following these rules:
https://github.com/moby/moby/blob/master/CONTRIBUTING.md#sign-your-work
The easiest way to do this is to amend the last commit:

$ git clone -b "fix/ssh-channel-not-closed" git@github.com:arcenik/docker-py.git somewhere
$ cd somewhere
$ git commit --amend -s --no-edit
$ git push -f

Amending updates the existing PR. You DO NOT need to open a new one.

[jcsirot]

@arcenik Thank you for your PR. However we are currently working on a patch globally improving the SSH support, including a fix for #2248