Merged PR 94: Fix ier reward calculation

## Summary
Logic error with negation of booleans.

## Test process
Run with debug logging to verify that no longer getting warnings about reference IERS being blocked.

## Checklist
- [x] This PR is linked to a **work item**
- [x] I have performed **self-review** of the code
- [ ] I have written **tests** for any new functionality added with this PR
- [ ] I have updated the **documentation** if this PR changes or adds functionality
- [x] I have run **pre-commit** checks for code style

Fix ier reward calculation

Related work items: #1554

src/primaite/environment/reward.py

@@ -78,8 +78,8 @@ def calculate_reward_function(
         start_step = ier_value.get_start_step()
         stop_step = ier_value.get_end_step()
         if step_count >= start_step and step_count <= stop_step:
-            reference_blocked = reference_ier.get_is_running()
-            live_blocked = ier_value.get_is_running()
+            reference_blocked = not reference_ier.get_is_running()
+            live_blocked = not ier_value.get_is_running()
             ier_reward = (
                 config_values.green_ier_blocked * ier_value.get_mission_criticality()
             )