logging: use the actual root logger as the root logger

Use the actual root logger (`logging.getLogger()`) rather than the `ipa`
logger (or the `root` logger in case of ipa-ods-exporter) as the root
logger.

Always configure logging on the root logger.

Reviewed-By: Martin Basti <mbasti@redhat.com>

ipaserver/advise/base.py

@@ -507,7 +507,7 @@ class IpaAdvise(admintool.AdminTool):
         advise_api.finalize()
         if not self.options.verbose:
             # Do not print connection information by default
-            logger_name = r'ipa\.ipalib\.plugins\.rpcclient'
+            logger_name = r'ipalib\.plugins\.rpcclient'
             root_logger.addFilter(Filter(logger_name, logging.WARNING))
 
         # With no argument, print the list out and exit