Fixed the test definitions for some of the AES tests, and re-added the
test definitions for the TDES tests (now with more "T" in the
filenames!). Also changed Util to output hex strings in lowercase rather
than uppercase since that's what the OpenSSL harness does and it makes
diffs much easier. All the AES and TDES tests we generate can now be
dealt with (correctly!) by OpenSSL's test harnesss.
Removed all the autogenerated .req and .rsp files; they change every
time we run, and it doesn't make sense to track them in the repository.