LPS-34082 Add JournalArticleStagedModelDataHandlerTest
LPS-34082 Add JournalFolderStagedModelDataHandlerTest
LPS-34082 Add JournalFeed support to JournalTestUtil
LPS-34082 Add JournalFeedStagedModelDataHandlerTest
LPS-34082 Very small change - changing hard coded string to ServiceTestUtil.randomString()
LPS-34082 SF