ctdb_mutex_ceph_rados_helper: revert strtoull_err() usage

[David Disseldorp]

On Fri, 1 Mar 2019 09:19:59 -0800, Jeremy Allison wrote:

> LGTM. RB+ and pushed. Sorry for the error. How should I
> configure (and what packages do I need on my test system)
> to ensure I don't make this mistake again ?

Thanks for the push.
With the Ceph development libraries installed, it should just be a
matter of configuring/building with --with-cluster-support and
--enable-ceph-reclock. I'll work on getting some form of CI running
with vfs_ceph + ceph-reclock.

Cheers, David