XWIKI-14564: Filter to hide system changes on documents, activated by

default
* Fix unit tests in xwiki-platform-notifications-sources

xwiki-platform-core/xwiki-platform-notifications/xwiki-platform-notifications-sources/src/test/java/org/xwiki/notifications/sources/internal/QueryGeneratorTest.java

@@ -27,6 +27,7 @@
 import org.junit.Rule;
 import org.junit.Test;
 import org.mockito.ArgumentMatchers;
+import org.mockito.internal.util.collections.Sets;
 import org.xwiki.configuration.ConfigurationSource;
 import org.xwiki.model.reference.DocumentReference;
 import org.xwiki.model.reference.EntityReferenceSerializer;
@@ -268,7 +269,7 @@ public void generateQueryWithFilters() throws Exception
         NotificationFilter notificationFilter1 = mock(NotificationFilter.class);
         NotificationFilter notificationFilter2 = mock(NotificationFilter.class);
         when(notificationFilterManager.getFilters(any(DocumentReference.class),
-                any(NotificationPreference.class))).thenReturn(Arrays.asList(notificationFilter1, notificationFilter2));
+                any(NotificationPreference.class))).thenReturn(Sets.newSet(notificationFilter1, notificationFilter2));
 
         when(notificationFilter1.filterExpression(any(DocumentReference.class), any(NotificationPreference.class)))
                 .thenReturn(
@@ -345,7 +346,7 @@ public void generateQueryWithNoRelevantFilters() throws Exception
         // Mocks
         NotificationFilter notificationFilter1 = mock(NotificationFilter.class);
         when(notificationFilterManager.getFilters(any(DocumentReference.class),
-                any(NotificationPreference.class))).thenReturn(Arrays.asList(notificationFilter1));
+                any(NotificationPreference.class))).thenReturn(Collections.singleton(notificationFilter1));
 
         when(notificationFilter1.filterExpression(any(DocumentReference.class), any(NotificationPreference.class)))
                 .thenReturn(new EmptyNode());