Cleanup on Connection, ConnectionManagerId, ConnectionManager classes part 2#1157

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hsaputra wants to merge 2 commits intoapache:masterfrom

hsaputra:cleanup_connection_classes_part2

Commits on Jun 20, 2014

Cleanup on Connection and ConnectionManager classes part 2 while I was working at the code there to help IDE:
hsaputra
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Commits on Jun 23, 2014

Fix Spark Scala style for line over 100 chars.
hsaputra
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