Bug 5503 [REVISED] comments shouldn't show patron's full name

Bug 5503 [REVISED] comments shouldn't show patron's full name

Adding a few choices for what information can be displayed
alongside comments in the OPAC:

- nothing
- full name
- first name
- last name
- first name and last name first initial
- username

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Tested by choosing each choice and previewing an individual title
with a comment and confirming the name was displayed properly. Then
choosing each option and prevewing the recent comments page.

All tests passed.

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Ran all tests again and it works as explained.