With these settings for server, replica and client it is possible to skip
package installation. This is for example useful if the packages are already
installed. The settings default to yes
The setting ipareplica_no_package_install has been removed.
The support for external cert files is not complete yet.
Please have a look at the example inventory file inventory/hosts.replica and
also the install and uninstall playbook files install-replica.yml and
uninstall-replica.yml