Compare trivy results cluster_name with None (#10992)

* Compare trivy results cluster_name with None

* fix lint

Author: paraddise

dojo/tools/trivy/parser.py

@@ -91,7 +91,7 @@ def get_findings(self, scan_file, test):
             if schema_version == 2:
                 results = data.get("Results", [])
                 return self.get_result_items(test, results, artifact_name=artifact_name)
-            elif cluster_name:
+            elif cluster_name is not None:
                 findings = []
                 vulnerabilities = data.get("Vulnerabilities", [])
                 for service in vulnerabilities: