ah_collections variable is used for 2 roles but have different requirements

[djdanielsson]

ah_collections variable is used for 2 roles but have different requirements. it is used in collection and publish role, I am thinking we probably need to either separate out the vars into two different ones to make sure you are calling the expected role (when using dispatch) or we need to align these two roles to have the same values names with maybe specific extra values for each. either way likely a breaking change.