ceph(-osd) charms missing GUID check for ceph journal partition

[JuanJo Ciarlante]

As as safety check, charm already has:

def is_osd_disk(dev):
            [...]
            if line.startswith(
                'Partition GUID code: 4FBD7E29-9D25-41B8-AFD0-062C0CEFF05D'
            ):
                return True

, but is missing a similar safety check for already formatted
ceph journal devices, FYI guid code is:
45B0969E-9B03-4F30-B4C6-B4B80CEFF106
, see https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs

[Chris MacNaughton (chris.macnaughton)]

This should already be complete: https://github.com/openstack/charm-ceph/blob/master/lib/ceph/__init__.py#L705