ceph-common: uniformize template path calls
ceph-common: uniformize template path calls

In order to align all Ansible versions, we now use the full path for the
template. We rely on `role_path` variable. Now all the tasks using
the template module have a uniform syntax.

Might fix issue raised in #483

Signed-off-by: Sébastien Han <62d754cc350e84d3b1c32ae79f976f5348e74a40@redhat.com>

ceph/ansible-ceph-osd