Unavailable time periods for rooms

User Story

As an examination planner, I want to define the time periods a certain room is unavailable so that no exams are scheduled in this room during these periods.

TBD

• How fine granular do the time periods have to be?
  • days --> from data1 to date2
  • half days
  • or even smaller periods?

Implementation Details

• Adjust the input date format (rooms.xlxs file) such that each room can have multiple time periods
• Add validation for propper validation
• Update data model and mappings
• Implement new OptaPlanner hard constraint that forbides scheduling exams in a room when it is unavialbe.