Use python instead of python2
Use python instead of python2

The initial keyring is generated from ansible server locally and the snippet works well for both v2 and v3 of python.

I don't see any reason why we should explicitly invoke`python2` instead of just `python`.

In some setups, `python2` is not symlinked to `python`; while `python` and `python3` refer to v2 and v3 respectively.

Signed-off-by: Ha Phan <0220172ba9bec180deede8c6ec8333f4ba3eee2b@gmail.com>
ceph/ceph-ansible,font/ceph-ansible,fgal/ceph-ansible,ceph/ceph-ansible,fgal/ceph-ansible,font/ceph-ansible