XWIKI-19826: Move the old event store to legacy

...est-docker/src/test/it/org/xwiki/like/test/ui/LikeIT.java

...er/src/test/it/org/xwiki/mentions/test/ui/MentionsIT.java

...platform/notifications/test/ui/NotificationsEmailsIT.java

...xwiki/platform/notifications/test/ui/NotificationsIT.java

...atform/notifications/test/ui/NotificationsSettingsIT.java

.../it/org/xwiki/user/directory/test/ui/UserDirectoryIT.java

.../test/it/org/xwiki/user/test/ui/UserChangePasswordIT.java

...ker/src/test/it/org/xwiki/user/test/ui/UserProfileIT.java

...er/src/test/it/org/xwiki/wiki/test/ui/WikiTemplateIT.java