Possible wrong import from guava

[withgit-contributor]

In master for boot 2.x, it looks like TestPropertyValues has import from guava

import com.google.common.collect.Streams;

public static TestPropertyValues of(Iterable<String> pairs) {
		if (pairs == null) {
			return empty();
		}
		return of(Streams.stream(pairs));
	}

Maybe this was a mistake and meant to use something from jdk? Anyway, guava is evil and should not be there.