Add openssh-server to install-dependencies
Add openssh-server to install-dependencies

This change adds openssh-server as an install dependency for ubuntu and
rhel. This is required for the virtual power manager in the seed vm to
ssh into the host machine.

Change-Id: Ib53ac9903b9645220f62225ffa774e9ceb8dd9f2

rdo-management/tripleo,rdo-management/tripleo