Hiding author name when page is anonymous on page lists (Bug 1386010)

Some places that were still showing the author's name:
- in elasticsearch
- on shared with me pages
- in 'latest pages' block on dashboard.

To test: see bug report

Change-Id: I106b7d506c2dc3d104f74ea884ff4285e5856483
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>