PlannerBenchmarkException + unit test to avoid the statistics regression of earlier this week
(cherry picked from commit 7df8f8384ad6b0dfe6d5f9fd39cefb47f1abfa94)
pas: delete dead code AdmissionPartSpecialismMissingInRoom
(cherry picked from commit c4dc508022cdd3b5bd71838d35f16cd699835968)
PAS: difficulty comparison: earlier nights are more difficult
(cherry picked from commit c6f68e26cd677d6eb7688b8382d26fdb844dcfa4)
PAS: solver config and benchmark config
(cherry picked from commit b6ca13c8ee4046392f2456316dcaafd48317f796)