DefaultCockroachPath is the path where the binary passed to the `--cockroach` flag will be made available in every node in the cluster.

EnvAssertionsEnabledSeed is the name of the environment variable that, when set, causes roachtest to use a binary with runtime assertions enabled (if available), using the random seed contained in that environment variable.

Test is the interface through which roachtests interact with the test harness.