Fixed funcall + read-from-string in more-conditions.asd

Fixes #1

Thanks to Anton Vodonosov for pointing out that lowercase strings are
better in such situations because of potential problems with Allegro
CL's Modern Mode and non-default readtables.

* more-conditions.asd (perform test-op eql :more-conditions-test):
  changed function name string to lowercase

Reported-by: Anton Vodonosov