records_controller_test tests that users can add annotations to a record when it is created
records_controller allows annotations_attributes with term and context, sets the creator_id

annotation model had to be modified to only validate_presence_of record (the association) rather
  than the record_id.  This is good to remember in general when a parent record accepts_nested_attributes for
  a child record, the parent_record needs to set the :inverse_of to the child association, and the child
  needs to make sure it only vaidates_presence_of the parent association rather than the parent_id

model/annotation_test modified to specify correct validates_presence_of record