Enable support for 'keyboard-interactive' authentication method

Now it's impossible to connect to SSH host if 'password' authentication method disabled and 'keyboard-interactive' enabled. Connection fails with message like:

Recording fingerprints
Sending e-mails to: <me>
SCP Connecting to <hostname>
ERROR: Failed to upload files
com.jcraft.jsch.JSchException: Auth fail
at com.jcraft.jsch.Session.connect(Session.java:473)
at com.jcraft.jsch.Session.connect(Session.java:145)
at be.certipost.hudson.plugin.SCPSite.createSession(SCPSite.java:149)
at be.certipost.hudson.plugin.SCPRepositoryPublisher.perform(SCPRepositoryPublisher.java:106)