udev: /dev/disk/by-parttypeuuid/$type-$uuid

We need this to help trigger OSD activations.

Signed-off-by: Sage Weil <sage@inktank.com>
ceph-disk: add 'activate-all'

Scan /dev/disk/by-parttypeuuid for ceph OSDs and activate them all.  This
is useful when the event didn't trigger on the initial udev event for
some reason.

Signed-off-by: Sage Weil <sage@inktank.com>
sysvinit, upstart: ceph-disk activate-all on start

On 'service ceph start' or 'service ceph start osd' or start ceph-osd-all
we should activate any osd GPT partitions.

Signed-off-by: Sage Weil <sage@inktank.com>