Fragment chain test might not use proper candidates list

[kamilsa]

polkadot-sdk/polkadot/node/core/prospective-parachains/src/fragment_chain/tests.rs

Lines 1433 to 1439 in 986e7ae

	// Now back all candidates. Back them in a random order. The result should always be the same.
	let mut candidates_shuffled = candidates.clone();
	candidates_shuffled.shuffle(&mut thread_rng());
	for candidate in candidates.iter() {
	chain.candidate_backed(candidate);
	storage.mark_backed(candidate);
	}

It is observed that in the given snippet of code used in the test of fragment chains functionality a shuffled list of candidates is created but is never actually used below in the test.

Please check if this test works properly (cc @alindima @iceseer)

[alindima]

good catch, thanks! indeed, I missed using the shuffled candidates list. I fixed this locally and the test passes. I'll fix it soon.