Fix for pylint (open-telemetry#1613)

Author: lzchen

opentelemetry-sdk/src/opentelemetry/sdk/trace/__init__.py

@@ -122,6 +122,8 @@ def force_flush(self, timeout_millis: int = 30000) -> bool:
         """
 
 
+# Temporary fix until https://github.com/PyCQA/pylint/issues/4098 is resolved
+# pylint:disable=no-member
 class SynchronousMultiSpanProcessor(SpanProcessor):
     """Implementation of class:`SpanProcessor` that forwards all received
     events to a list of span processors sequentially.