'Get volume path.
Get volume path (local fs path) for given volume name on given nfs
share.
:param nfs_share: string, example 172.18.194.100:/var/nfs
:param volume_name: string,
example volume-91ee65ec-c473-4391-8c09-162b00c68a8c'

def _get_volume_path(self, nfs_share, volume_name):

    return os.path.join(self._get_mount_point_for_share(nfs_share), volume_name)
