Feature Request: pull RNG calls out of wh_test_crypto.c individual tests for clarity and ease of use

[dcanthony68]

Many of the tests in wh_test_crypto.c pass in a pointer to a RNG context solely to generate random data for the test. Generating the random value at the top level of whTest_CryptoClientConfig() and then passing the randomly generated value into the individual tests makes test failures much easier to diagnose. It allows for easy modification to use values with known results when troubleshooting and avoid failures in the RNG propagating into the rest of the test cases.

[bigbrett]

@dcanthony68 Different tests use different sized random data for different things, so it is not as simple as generating one random value and propagating that through. And generating the largest possible buffer of random data would constantly require changing size as new tests are added. How do you propose handling this?