JavaNetworkWordCount.java has a wrong import

JavaNetworkWordCount.java has a wrong import.

Line 28 in spark/examples/src/main/java/org/apache/spark/examples/streaming/JavaNetworkWordCount.java reads as

import org.apache.spark.streaming.Durations;

But according to the documentation, it should be Duration (or Seconds), not *Durations* .

Also line 60 should change accordingly because currently it reads as:

JavaStreamingContext ssc = new JavaStreamingContext(sparkConf, Durations.seconds(1));