* This is useful for making IDs for object in partitioned stores.
* The "UID" functions are not called "UUIDs" since they don't follow RFC4122.
This is for performance reasons since the ID fields tend to be indexed.
* This includes newUUIDv4(), which is compliant with the aforementioned RFC.
This reverts commit 86f895bfe3.
Change-Id: I989626dfb7976d17f5931a34fe040f41cf14dfe3
