Small helper functions, making it easier to write unit testable functions
update info file with helper file
Add theme definition and function for consortia messages
refactor _bibdk_reservation_generate_policy_messages to make it unit testable + add functionality for consortia libraries
move mail functionality to include file
mail inc content added
added unit test for _bibdk_reservation_generate_policy_messages
move comment
Remove error message if consortia message
moved mail functionality to separate file