Removed add clusters and modify cluster#42

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vvutharkar wants to merge 3 commits intoyahoo:masterfrom

vvutharkar:master

Commits on Mar 28, 2015

Removed add clusters and modify cluster
vvutharkar-ebay
committed

Commits on May 27, 2015

do not convert cluster name and zookeeper hosts to lowercase
vvutharkar-ebay
committed

Commits on Aug 17, 2015

Adding 0.8.2.1 in supported versions
vvutharkar-ebay
committed