Fix tests

hwbench/environment/vendors/vendor.py

@@ -69,7 +69,7 @@ def get_pdus(self) -> list[PDU]:
         """Return a list of PDUs object"""
         return self.pdus
 
-    def find_monitoring_sections(self, section_type: str, sections_list: list | None, max_sections=0):
+    def find_monitoring_sections(self, section_type: str, sections_list: list | None = None, max_sections=0):
         """Return sections of section_type from the monitoring configuration file"""
         if sections_list is None:
             sections_list = []