rdkafka_example: call poll() from consumer too
rdkafka_example: call poll() from consumer too

orthrus/librdkafka,senior7515/librdkafka,senior7515/librdkafka,orthrus/librdkafka,klonikar/librdkafka,klonikar/librdkafka,janmejay/librdkafka,klonikar/librdkafka,janmejay/librdkafka,orthrus/librdkafka,janmejay/librdkafka,senior7515/librdkafka,senior7515/librdkafka,janmejay/librdkafka,orthrus/librdkafka,klonikar/librdkafka