fix bug that doesn't resent an individuals server to False after slotted service

Author: geraintpalmer

ciw/node.py

@@ -597,6 +597,8 @@ def release(self, next_individual, next_node):
         if not isinf(self.c) and not self.slotted:
             newly_free_server = next_individual.server
             self.detatch_server(newly_free_server, next_individual)
+        if self.slotted:
+            next_individual.server = False
         self.reset_individual_attributes(next_individual)
         self.simulation.statetracker.change_state_release(
             self, next_node, next_individual, next_individual.is_blocked

ciw/tests/test_scheduling.py

@@ -626,6 +626,7 @@ def test_slotted_services(self):
         expected_service_dates = [1, 1, 1, 2, 2, 3, 3, 3, 4]
         observed_service_dates = [r.service_start_date for r in recs]
         self.assertEqual(observed_service_dates, expected_service_dates)
+        self.assertFalse(any([ind.server for ind in Q.nodes[-1].all_individuals]))
 
     def test_slotted_services_repeat(self):
         """