remove Rake invocation: db:test:prepare from spec_helper
remove Rake invocation: db:test:prepare from spec_helper

This caused a very strange error where creations of 
User objects (AFTER the first creation) were successful
BUT had an id  == 0 when run in a spec test.

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