TMSS-601: Replaced INPUT/OUTPUT roles by ANY role, as input or outputness is already encoded in output field

TMSS-668: Move retrieving of active station reservations function from dynamic scheduler to separate reservations module. Add unittests for reservations module. Add stop_time in Reservations model, and calculate duration (it was visa versa)

Changes updated based on review comments

TMSS-528: moved station_list to top so it can be used later when parsing beamforming station settings

Updated based on Review Comments

TMSS-528: When observing beamforming is done on the intersection of all stations in this list and the used stations in the observation. So, specifyng all possible stations here means that all observation-stations are used. Specifying a small subset here means that only the observing-stations in this small list are used