Bug 10463: ensure that Quote of the Day feature selects random quotes

When the Quote of the Day tool selects a new new quote, it updates the
timestamp and does not take the timezone into account.  Thus the time is
set to +4 hours (e.g. 2013-06-11 13:33:48 when the time is 2013-06-11
        09:33:48).  It then repeats the same quote every day.

To replicate:

Set Administration >> System preferences >> OPAC preferences >> Features
>> QuoteOfTheDay to Enable

In Home >> Tools >> Quote Editor, add several quotes.

In the opac, refresh the home page. You should get a quote of the day at
the top.

mysql> select * from quotes;

Note the timestamp of the quote selected by the tool. It will not match
the date on the machine (unless your server's timezone is set to UTC).

If you change the date to the previous date and refresh the opac, the
tool wlill select another quote, which will not change unless forced.

Test Plan:
1) Remove all your quotes and import a fresh set
2) Enable the quote of the day and view the opac
3) Look at your quotes table and note the timestamp is incorrect
4) Repeat steps 1 and 2
5) Look at your quotes table and note the timestamp is now correct

Signed-off-by: Srdjan <srdjan@catalyst.net.nz>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>