'Import an existing RSA key file to EC2
Returns boto.ec2.keypair.KeyPair'

def import_keypair(self, name, rsa_key_file):

    k = sshutils.get_rsa_key(rsa_key_file)
    pub_material = sshutils.get_public_key(k)
    return self.conn.import_key_pair(name, pub_material)
