Adjust parallel check for pytest-xdist slaveinput -> workerinput renaming

pytest-xdist no longer sets the old name.

Author: bluetech

pytest_rerunfailures.py

@@ -266,7 +266,7 @@ def pytest_runtest_protocol(item, nextitem):
     # first item if necessary
     check_options(item.session.config)
     delay = get_reruns_delay(item)
-    parallel = hasattr(item.config, "slaveinput")
+    parallel = hasattr(item.config, "slaveinput") or hasattr(item.config, "workerinput")
     item.execution_count = 0
 
     need_to_run = True