TMSS-2710 & TMSS-2593: use process_start/stop_time to query timeline units

SAS/TMSS/frontend/tmss_webapp/src/services/schedule.service.js

@@ -142,7 +142,7 @@ const ScheduleService = {
         let blueprints = [];
         try {
             let url = `/api/scheduling_unit_blueprint_slim/`;
-            url = `${url}?scheduled_start_time_before=${endTime || ''}&scheduled_stop_time_after=${startTime || ''}`;
+            url = `${url}?process_start_time_before=${endTime || ''}&process_stop_time_after=${startTime || ''}`;
             let initialResponse = await axios.get(url);
             const totalCount = initialResponse.data.count;
             const initialCount = initialResponse.data.results.length