Right now default cloud images of Ubuntu does contain dynamic MOTD
by default, that takes around extra 0.4 sec for establishing connection.
Disabiling MOTD should improve responsivness of hosts and speedup
ansible execution as well.
With that we're keeping static MOTD that has no impact on connection
speed.
Change-Id: Iaf25f6f444055cefd60dd2e3b4d5579f2a6fcdb1
b31cd46c18