Install motd-tail.

In order to show the list and info of chef,
install motd-tail.

This commit refs #185.
Enable the PAM module in sshd_config.

In order to show motd (= message of the day), enable PAM module.

This commit refs #185.
Deploy the motd-tail to the client server.

This commit fixes #185.
Merge branch 'id/185' into dev
Merge branch 'dev'