#2682 Backport changes to core PrimAITE

tests/e2e_integration_tests/environments/test_rllib_multi_agent_environment.py

@@ -39,3 +39,4 @@ def test_rllib_multi_agent_compatibility():
         ),
         param_space=config,
     ).fit()
+    ray.shutdown()

tests/e2e_integration_tests/environments/test_rllib_single_agent_environment.py

@@ -41,3 +41,4 @@ def test_rllib_single_agent_compatibility():
     assert save_file.exists()
 
     save_file.unlink()  # clean up
+    ray.shutdown()