Bug 35597: Log creation on suggestion from staff or OPAC

Bug 35597: Log creation on suggestion from staff or OPAC

To test:
1. Apply patch, restart services, updatedatabase
2. Search for the system preference 'SuggestionsLog', it should be off.
   Turn it on.
3. Create a purhase suggestion
4. Go to Tools > Log viewer. In modules check 'Suggestions'
5. You should see your newly created suggestion.
6. Create a suggestion from the OPAC.
7. You should see your newly created OPAC suggestion.
8. Modify the suggestion and check the logs again, the modification
   should be logged.
9. Delete the suggestion, the deletion should be logged.
10. Do a purchase suggestion via the OPAC.
11  Check the logs to see the newly created suggestion, the interface
    should be OPAC.
12. Turn off SuggestionsLog
13. No changes of any kind should be logged.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Ray Delahunty <lib-systems@arts.ac.uk>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>