Bad display of non-viewable users in the likers page

Reproduction steps:

• Create two users U1 and U2
• Create a page P1
• Disable the view right on U1 for U2
• Make U1 likes P1
• Visit the likers of P1 with P2

Expected:

• U1 is not part of the table, or is presented as not viewable

Actual:

• $escapetool.xml($userReference.name) is displayed in the User column

http://localhost:8082/xwiki/bin/view/Main/$xwiki.getURL($userReference)