Method randomKey

fdbserver/workloads/KVStoreTest.actor.cpp:146–146

	}

	Key randomKey() { return makeKey(deterministicRandom()->randomInt(0, nodeCount)); }
	Key makeKey(Version value) {
		Key k;
		((KeyRef&)k) = KeyRef(new (k.arena()) uint8_t[keyBytes], keyBytes);