[FIX] Parsing db_names from config

When trying to load queue_job module with `--load base,web,queue_job`,
and specifying database either with command line option `-d` or with
`db_name` variable in config, an error was raised:

`AttributeError: 'list' object has no attribute 'split'`.

It's due to a change in parsing `db_name` config variable.
Previously the database name list was parsed as a string with
coma-separated values. Currently, the config always returns a list.

Author: maciej-wichowski

queue_job/jobrunner/runner.py

@@ -473,7 +473,7 @@ def from_environ_or_config(cls):
 
     def get_db_names(self):
         if config["db_name"]:
-            db_names = config["db_name"].split(",")
+            db_names = config["db_name"]
         else:
             db_names = odoo.service.db.list_dbs(True)
         return db_names