LPS-47433 Extract and group test methods to multiple base classes - no logic changes
LPS-47433 Reformat Wiki Subscription tests
LPS-47433 Reformat Blog Subscription tests
LPS-47433 Reformat Bookmarks Subscription tests
LPS-47433 Reformat DL Subscription tests
LPS-47433 Reformat journal Subscription tests
LPS-47433 Make them abstract because they need to be implemented
LPS-47433 SF