Tag functions inconsistencies between Addon and Application

[auguster]

I think Application.updateTag() should be renamed Application.addTag() to match Addon.addTag() as both function have the same role on different models and both make a PUT call to the API.

To fix this, you could introduce an alias so it doesn't impact people already using Application.updateTag().

The other function matches on removeTag and getAllTags. replaceAddonTags is only present on Addon which is kind of wierd, it should be named replaceTags and present in Application for the same purpose.