Rename main logger

The name is not displayed anywhere. Changing it to lowercase will
however avoid possible problem if we create a sublogger somewhere else
in the codebase with name based on module name. Such logger would not
have any handlers defined.

Signed-off-by: Lubomír Sedlář <lsedlar@redhat.com>

bin/pungi-koji

@@ -194,7 +194,7 @@ def main():
 
     from pungi.compose import Compose
 
-    logger = logging.getLogger("Pungi")
+    logger = logging.getLogger("pungi")
     logger.setLevel(logging.DEBUG)
     if not opts.quiet:
         kobo.log.add_stderr_logger(logger)