Downgrade informational messages from warning level

In upgrade scenarios informational messages that indicate old config
files are being imported into the new config are now being treated as
informational rather than warnings which may alarm the reader.

Fixes 13464

gramps/gen/config.py

@@ -403,9 +403,9 @@ def emit(key):
     # If not, let's read old if there:
     if os.path.exists(os.path.join(USER_CONFIG, "keys.ini")):
         # read it in old style:
-        logging.warning("Importing old key file 'keys.ini'...")
+        logging.info("Importing old key file 'keys.ini'...")
         CONFIGMAN.load(os.path.join(USER_CONFIG, "keys.ini"), oldstyle=True)
-        logging.warning("Done importing old key file 'keys.ini'")
+        logging.info("Done importing old key file 'keys.ini'")
     # other version upgrades here...
     # check previous version of gramps:
     fullpath, filename = os.path.split(CONFIGMAN.filename)
@@ -424,11 +424,9 @@ def emit(key):
             digits = str(int(match.groups()[0]) - i)
             previous_grampsini = os.path.join(fullpath, "gramps" + digits, filename)
             if os.path.exists(previous_grampsini):
-                logging.warning("Importing old config file '%s'...", previous_grampsini)
+                logging.info("Importing old config file '%s'...", previous_grampsini)
                 CONFIGMAN.load(previous_grampsini)
-                logging.warning(
-                    "Done importing old config file '%s'", previous_grampsini
-                )
+                logging.info("Done importing old config file '%s'", previous_grampsini)
                 break
 
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