XWIKI-9290: The live table doesn't display nicely the user column when you are logged out (fixed).
XWIKI-9314: User and group names aren't displayed correctly for guests in an app's livetable (correct the fix to handle groups too).
Merge pull request #125 from gdelhumeau/XWIKI-9290

XWIKI-9290: The live table doesn't display nicely the user column when y...