Palo Alto Cortex XDR | Updates (#2889)

* Add custom config exceptions and update unit tests for errors

* Fix bug in get incidents trigger, update version

* Update checksum for task schema

* Util update, no unit tests for testing

* Broken unit test fix 2

* Fix unit tests

plugins/palo_alto_cortex_xdr/unit_test/test_get_incidents.py

@@ -46,7 +46,7 @@ def check_error():
             "host_count": 1,
             "xdr_url": "https://example.com/incident-view?caseId=1",
             "starred": False,
-            "hosts": ["example-host", "example-host-2"],
+            "hosts": [{"hostname": "example-host"}, {"hostname": "example-host-2"}],
             "users": ["administrator"],
             "incident_sources": ["XDR Agent"],
             "wildfire_hits": 4,