toolbox: _common: give a more unique name to the temp play files

otherwise there might be conficts when running commands in parallel

I'm not sure why NamedTemporaryFile doesn't give truly unique names, but I don't have time to investigate ...

toolbox/_common.py

@@ -171,7 +171,10 @@ def _run(self):
         print(f"Using '{env['ANSIBLE_JSON_TO_LOGFILE']}' as ansible json log file.")
 
         # the play file must be in the directory where the 'roles' are
-        tmp_play_file = tempfile.NamedTemporaryFile("w+", dir=os.getcwd(), delete=False)
+        tmp_play_file = tempfile.NamedTemporaryFile("w+",
+                                                    prefix="tmp_play_{}_".format(artifact_extra_logs_dir.name),
+                                                    suffix=".yaml",
+                                                    dir=os.getcwd(), delete=False)
         generated_play = [
             dict(name=f"Run {self.role_name} role",
                  connection="local",