LPS-49773 Use a more specific method to retrieve the last wiki page version (if we retrieve the wikiPageByPageId we could be obtaining an incorrect version)
LPS-49773 [NO CHANGES- Copy and paste from WikiPageTrashHandlerTest] Create a new class to encapsulate the wiki page dependents specific tests
LPS-49773 [NO CHANGES- Copy and paste from WikiPageTrashHandlerTest] Create a new util class to reuse logic
LPS-49773 Delete all the unnecessary methods in each class and extract common methods to a util class