nightly-container: Enable lvmetad & udev for lvm

[kshlm]

LVM config is modified to enable lvmetad and udev support. The lvm2 tmpfiles config is also removed to prevent /run/lvm bind-mounts from being overwritten.

This requires that lvmetad is enabled on the host, and the lvmetad.socket and udev control socket from the host are bind-mounted within the container at /run/lvm/lvmetad.socket and /run/udev/control respectively.

Depends on gluster/gcs#112, which needs to be merged for this to work correctly.