This is useful during provisioning, when the keys were not generated
by sshd-keygen service or similar principles depending on operating
system.
This is also helpful when running this role in containers, where
is no service running either.
The keys are generally readable only by root, but in RHEL and Fedora,
they are readable also by group ssh_keys, which is used for hostbased
authentication.
This should fix#111
The usage of set_facts inside of roles is not recommended if
it is used for internal variables used only inside of the role.
It is recommended to use variables with smaller scope to avoid
inter-dependencies between different invocations of the same
role as demonstrated in the tests_alternative_file.yml later
in the patch series
ttps://github.com/oasis-roles/meta_standards#ansible-best-practices
