Handle recursion errors
Handle recursion errors

In some cases, for example when a frame is App.ZApplication.ZApplicationWrapper, then "frame.f_locals.get('self', None)" raises a maximum recursion depth error. This fix catches these and moves further so Zope continues to run (without the fix Zope breaks) and we still get a (request-less) error report in Sentry.
getsentry/raven-python,ronaldevers/raven-python,Photonomie/raven-python,ronaldevers/raven-python,smarkets/raven-python,icereval/raven-python,danriti/raven-python,inspirehep/raven-python,lepture/raven-python,johansteffner/raven-python,jbarbuto/raven-python,Goldmund-Wyldebeast-Wunderliebe/raven-python,hzy/raven-python,ewdurbin/raven-python,jbarbuto/raven-python,akheron/raven-python,percipient/raven-python,smarkets/raven-python,percipient/raven-python,getsentry/raven-python,Photonomie/raven-python,nikolas/raven-python,ronaldevers/raven-python,jmagnusson/raven-python,danriti/raven-python,Goldmund-Wyldebeast-Wunderliebe/raven-python,akalipetis/raven-python,percipient/raven-python,recht/raven-python,jbarbuto/raven-python,arthurlogilab/raven-python,inspirehep/raven-python,dbravender/raven-python,jbarbuto/raven-python,akheron/raven-python,dbravender/raven-python,Goldmund-Wyldebeast-Wunderliebe/raven-python,smarkets/raven-python,jmagnusson/raven-python,Goldmund-Wyldebeast-Wunderliebe/raven-python,hzy/raven-python,inspirehep/raven-python,akalipetis/raven-python,lepture/raven-python,icereval/raven-python,smarkets/raven-python,johansteffner/raven-python,someonehan/raven-python,getsentry/raven-python,nikolas/raven-python,lepture/raven-python,someonehan/raven-python,jmp0xf/raven-python,nikolas/raven-python,Photonomie/raven-python,someonehan/raven-python,johansteffner/raven-python,icereval/raven-python,akheron/raven-python,inspirehep/raven-python,akalipetis/raven-python,dbravender/raven-python,jmp0xf/raven-python,nikolas/raven-python,hzy/raven-python,ewdurbin/raven-python,arthurlogilab/raven-python,icereval/raven-python,danriti/raven-python,recht/raven-python,recht/raven-python,jmagnusson/raven-python,arthurlogilab/raven-python,ewdurbin/raven-python,jmp0xf/raven-python,arthurlogilab/raven-python