SSHD Service extensions

SSHD Service extensions

This change implements a MOTD message and provides a hash of
sshd config options which are sourced to the puppet-ssh module
as a hash.

The SSHD puppet service is enabled by default, as it is
required for Idb56acd1e1ecb5a5fd4d942969be428cc9cbe293.
Also added the service to the CI roles.

Change-Id: Ie2e01d93082509b8ede37297067eab03bb1ab06e
Depends-On: I1d09530d69e42c0c36311789166554a889e46556
Closes-Bug: #1668543
Co-Authored-By: Oliver Walsh <owalsh@redhat.com>