Upgrade elasticsearch to 2.3.0
Upgrade elasticsearch to 2.3.0

pypa/warehouse,alex/warehouse,alex/warehouse,dstufft/warehouse,dstufft/warehouse,karan/warehouse,wlonk/warehouse,dstufft/warehouse,karan/warehouse,pypa/warehouse,pypa/warehouse,karan/warehouse,wlonk/warehouse,dstufft/warehouse,alex/warehouse,alex/warehouse,alex/warehouse,karan/warehouse,wlonk/warehouse,pypa/warehouse,karan/warehouse