dns-ha - code not compatible with python3-yaml from jammy/antelope

MAAS DNS driver is using yaml library from OS. In case of running the charm on node with jammy/antelope repository the python3-yaml is in 6.0 version. In that version yaml.load requires mandatory Loader argument (https://github.com/yaml/pyyaml/pull/561).

This can be fixed by either adding the Loader or replacing the method like below:

--- /usr/lib/heartbeat/maasclient/apidriver.py
+++ apidriver_safe.py
@@ -91,7 +91,7 @@

         code = response.getcode()
         if code == OK:
- return Response(True, yaml.load(payload), code)
+ return Response(True, yaml.safe_load(payload), code)
         else:
             return Response(False, payload, code)

@@ -107,7 +107,7 @@

             code = response.getcode()
             if code == OK:
- return Response(True, yaml.load(payload), code)
+ return Response(True, yaml.safe_load(payload), code)
             else:
                 return Response(False, payload, code)
         except HTTPError as e: