title: How to convert RDD[GenericRecord] to dataframe in scala?
body: <p>I get tweets from kafka topic with Avro (serializer and deserializer).
  Then i create a spark consumer which extracts tweets in Dstream of RDD[GenericRecord].
  Now i want to convert each rdd to a dataframe to analyse these tweets via SQL.
  Any solution to convert RDD[GenericRecord] to dataframe please ?</p>