Comment 3 for bug 1577632

So, I debugged this further:

* paramiko version 1.16.0 vs. 1.17.0 - still hanging
* open SSH version: "OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.6, OpenSSL 1.0.1f 6 Jan 2014” and "OpenSSH_6.9p1 Ubuntu-2ubuntu0.1, OpenSSL 1.0.2d 9 Jul 2015” - still hanging
* Ubuntu OS as I trie both 14.04 and 15.10 - still hanging
* changed virtual machine location datacenter/hypervisor - still hanging

* replaced the Tempest SSH client with another ssh client - WORKS!

So, I think it might be the Tempest SSH client that is having issues - I suspect that the transport never closes causing a deadlock.

Here's the base ssh client that I used to replace the Tempest one: https://gist.github.com/blakev/697acbc242a683d4eb38 (thanks to blakev!)

Please take a look.