[regression] ClientSession.WAIT_AUTH does not wait for server key to be available

Hello,

Up to 0.9.0 release waiting for WAIT_AUTH was enough to examine server key before proceeding and authenticating.

Since 0.10.0 the WAIT_AUTH happens before ServerKeyVerifier is called, so a simple sequence of acquire host key without authentication is not possible as far as I can see.

bisected to:

commit 03aa3979d47b92ad7b01fcfe1e2833a050b7118d
Author: Guillaume Nodet <gnodet@apache.org>
Date: Wed Jan 29 12:01:53 2014 +0100

SSHD-282 Abstract the SSH Service to make it more pluggable