remove chache files before update offering count.
remove chache files before update offering count.

This Cap task was failing because the cache had to
be invalidated and the permissions on production
wouldn't allow the current user to delete the files.

concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse