Validate UniqueID Pattern

[rsoika]

The DocumentService should validate the pattern of a given unqiueid to match the expected format.

It should not be possible to set an ID like '123' this causes problems in other modules like the imixs-archive system which expects the UID pattern.

We support the official UID pattern and also the old as also the snapshot patterns

REGEX_SNAPSHOTID = "([a-f0-9]{8}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{4}-[a-f0-9]{12}-[0-9]{13,15})";
REGEX_OLD_SNAPSHOTID = "([0-9a-f]{8}-.*|[0-9a-f]{11}-.*)";