refact python installation
refact python installation

This commit refacts the python installation when no available.

In order to avoid generating errors, we check for each package manager
to detect which system we are running on.

Signed-off-by: Guillaume Abrioux <30a9df5a0293a6108675377fa1673f7aa713f915@redhat.com>

ceph/ceph-ansible,ceph/ceph-ansible