return penalty objects from retrieve_penalties. flesh the event desc with the penalt...

return penalty objects from retrieve_penalties.  flesh the event desc with the penalty label for circ panelaties.  to reduce overhead, call the local penalty calculater from the fine generator

git-svn-id: svn://svn.open-ils.org/ILS/trunk@11814 dcc99617-32d9-48b4-a31d-7c20da2025e4