[SPARK-19003][DOCS] Add Java example in Spark Streaming Guide, section Design Patterns for using foreachRDD#16408

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adesharatushar wants to merge 2 commits intoapache:masterfrom

adesharatushar:streaming-doc-fix

Commits on Dec 26, 2016

Added Java example for using connections with streaming.
adesharatushar
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Commits on Dec 28, 2016

Made code similar to Scala, corrected formatting.
adesharatushar
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