ssh_public_key_contents should not assume key type rsa

[andylytical]

add_client creates a root ssh_authorized_key and hardcodes the type as 'rsa'.

Better would be to read the type directly from the key provided. An example is:

YAML:

---
gpfs::add_client::ssh_public_key_contents: >-
    ecdsa-sha2-nistp521
    key_content
    root@gpfs_master

MODULE:

$pubkey_parts = split( $ssh_public_key_contents, ' ' )
ssh_authorized_key { $pubkey_parts[2] :
    ensure => present,
    user   => 'root',
    type   => $pubkey_parts[0],
    key    => $pubkey_parts[1],
}