Elasticsearch Operator failing to get index settings errors with jaeger indices

Issue

• The Elasticsearch Operator (EO) is failing to get index settings from Jaeger indices with errors like:

  {"_ts":"2021-10-15T12:03:30.72868073Z","_level":"0","_component":"elasticsearch-operator","_message":"failed to get index settings","_error":{"cause":{"Value":"string","Type":{},"Offset":81,"Struct":"IndexMapperSettings","Field":"settings.index.mapper.dynamic"},"destination_type":"estypes.IndexSettings","index":"jaeger-service-2021-10-15","msg":"failed to decode response body"},"cluster":"elasticsearch","index":"jaeger-service-2021-10-15","namespace":"service-mesh"}