minor: make private class final with default constructor

...java/org/xwiki/administration/test/po/EditGroupModal.java

...nal/migration/hibernate/R40001XWIKI7540DataMigration.java

...entstream/internal/DefaultUntypedRecordableEventTest.java

...tstream/internal/DefaultRecordableEventConverterTest.java

...sion/xar/internal/doc/InstalledExtensionDocumentTree.java

.../src/test/it/org/xwiki/flamingo/test/ui/HTMLExportIT.java

...n/java/org/xwiki/livedata/test/po/TableLayoutElement.java

...java/org/xwiki/mentions/internal/DefaultQuoteService.java

...in/java/org/xwiki/model/reference/EntityReferenceSet.java

...ations/notifiers/internal/email/IntervalUsersManager.java

...rs/internal/email/live/LiveNotificationEmailListener.java

...ernal/DefaultTargetableNotificationPreferenceBuilder.java

...rces/internal/DefaultParametrizedNotificationManager.java

...ava/com/xpn/xwiki/internal/doc/ListAttachmentArchive.java

...ts/classes/ImplicitlyAllowedValuesDBListQueryBuilder.java

...n/xwiki/store/migration/AbstractDataMigrationManager.java

...ore/migration/hibernate/R35100XWIKI7564DataMigration.java

...ore/migration/hibernate/R35101XWIKI7645DataMigration.java

...ore/migration/hibernate/R40000XWIKI6990DataMigration.java

...ore/migration/hibernate/R42000XWIKI7726DataMigration.java