Add Tez content

Adding some text around Hive on Tez
Update hdinsight-use-hive.md

fixing some strangeness with a <properties> being included, fixing some links
Update hdinsight-use-hive.md
Update hdinsight-use-hive.md

Adding a note about future cluster versions.
Update hdinsight-use-hive.md
Merge pull request #2015 from mwinkle/patch-3

Adding details to Hive documentation on using Tez