Disable failing unified CRUD tests (#1381)

JAVA-5458

Author: jyemin

driver-sync/src/test/functional/com/mongodb/client/unified/UnifiedCrudTest.java

@@ -25,6 +25,8 @@
 import java.net.URISyntaxException;
 import java.util.Collection;
 
+import static com.mongodb.ClusterFixture.isDiscoverableReplicaSet;
+import static com.mongodb.ClusterFixture.serverVersionAtLeast;
 import static org.junit.Assume.assumeFalse;
 
 public class UnifiedCrudTest extends UnifiedSyncTest {
@@ -49,6 +51,10 @@ public static void customSkips(final String fileDescription, final String testDe
         assumeFalse(testDescription.equals("Unacknowledged findOneAndUpdate with hint document on 4.4+ server"));
         assumeFalse(testDescription.equals("Unacknowledged findOneAndDelete with hint string on 4.4+ server"));
         assumeFalse(testDescription.equals("Unacknowledged findOneAndDelete with hint document on 4.4+ server"));
+        if (isDiscoverableReplicaSet() && serverVersionAtLeast(8, 0)) {
+            assumeFalse(testDescription.equals("Aggregate with $out includes read preference for 5.0+ server"));
+            assumeFalse(testDescription.equals("Database-level aggregate with $out includes read preference for 5.0+ server"));
+        }
     }
 
     @Parameterized.Parameters(name = "{0}: {1}")