Check required config param are not empty

utilities.py

@@ -36,12 +36,14 @@ def parse_config(config_file):
     """
 
     config_dict = load_yaml(config_file)
-    if isinstance(config_dict, dict):
-        #logging.debug("Config dictionary: {0}".format(config_dict))
-        return config_dict
-    else:
+    if not isinstance(config_dict, dict):
         logging.critical("Config yaml file is not a dictionary" % config_file)
         sys.exit()
+    else:
+        #logging.debug("Config dictionary: {0}".format(config_dict))
+        #required_param = [constants.]
+        #check_not_empty_param()
+        return config_dict
 
 def parse_input(input_file):
     """