corrected config param typo

Author: chillaq

splitio/client/config.py

@@ -60,7 +60,7 @@
     'storageWrapper': None,
     'storagePrefix': None,
     'storageType': None,
-    'FlagSetsFilter': None
+    'flagSetsFilter': None
 }
 
 def _parse_operation_mode(sdk_key, config):
@@ -143,6 +143,6 @@ def sanitize(sdk_key, config):
         _LOGGER.warning('metricRefreshRate parameter minimum value is 60 seconds, defaulting to 3600 seconds.')
         processed['metricsRefreshRate'] = 3600
 
-    processed['FlagSetsFilter'] = validate_flag_sets(processed['FlagSetsFilter'], 'SDK Config') if processed['FlagSetsFilter'] is not None else None
+    processed['flagSetsFilter'] = validate_flag_sets(processed['flagSetsFilter'], 'SDK Config') if processed['flagSetsFilter'] is not None else None
 
     return processed