replace logger by LOGGER, as it is a global

common/python/nomadcore/match_highlighter.py

@@ -3,7 +3,11 @@ from builtins import object
 import logging
 from   operator import itemgetter
 import re
-logger = logging.getLogger("nomadcore.match_highlighter")
+
+
+LOGGER = logging.getLogger("nomadcore.match_highlighter")
+
+
 class ANSI(object):
     RESET='\033[0m'
     RESET_COLOR='\033[39;49m'