fix(tests): Be more lenient when handling pytest exceptions

Author: a-ungurianu

kazoo/tests/conftest.py

@@ -4,7 +4,7 @@
 
 
 def pytest_exception_interact(node, call, report):
-    if hasattr(node._testcase, "cluster"):
+    if hasattr(node, "_testcase") and hasattr(node._testcase, "cluster"):
         cluster = node._testcase.cluster
         log.error("Zookeeper cluster logs:")
         for logs in cluster.get_logs():