Use ::class in test mocks

apps/comments/tests/Unit/Controller/NotificationsTest.php

apps/comments/tests/Unit/Notification/ListenerTest.php

apps/dav/tests/unit/CalDAV/AbstractCalDavBackend.php

apps/dav/tests/unit/CalDAV/CalendarTest.php

apps/dav/tests/unit/CalDAV/PublicCalendarRootTest.php

apps/dav/tests/unit/CalDAV/Publishing/PublishingTest.php

apps/dav/tests/unit/CalDAV/Schedule/IMipPluginTest.php

apps/dav/tests/unit/CardDAV/AddressBookTest.php

apps/dav/tests/unit/CardDAV/CardDavBackendTest.php

apps/dav/tests/unit/CardDAV/ContactsManagerTest.php

apps/dav/tests/unit/CardDAV/ConverterTest.php

apps/dav/tests/unit/CardDAV/Sharing/PluginTest.php

apps/dav/tests/unit/CardDAV/SyncServiceTest.php

apps/dav/tests/unit/Comments/CommentsNodeTest.php

apps/dav/tests/unit/Comments/CommentsPluginTest.php

apps/dav/tests/unit/Comments/EntityCollectionTest.php

apps/dav/tests/unit/Comments/EntityTypeCollectionTest.php

apps/dav/tests/unit/Comments/RootCollectionTest.php

apps/dav/tests/unit/Connector/PublicAuthTest.php

apps/dav/tests/unit/Connector/Sabre/AuthTest.php