Use correct Crypto-Condition Test Vectors

[sappenin]

Currently, the Java implementation of crypto-conditions runs its tests on a corrected, forked version of the RFC's test vectors.

We need to instead update the test-vectors in the RFC per draft-4, and then update the test harness to point to these vectors instead.

[sappenin]

As part of this ticket, restore the test-vectors folder that was found in the Quilt project (it was basically just a file-pointer to the RFC's repo. See folder called test-data @ 7647a45 here: https://github.com/hyperledger/quilt/tree/feature/ilp-node/crypto-conditions)