Rebuild elasticsearch ganglia monitoring

Removed the broken support for pulling stats for particular indexes.
We don't use it and it was breaking everything.

Add a bunch of metrics that must have been added after the script was
first written.

Switch a bunch of metrics to counters rather than guages because we care
about their rate of increase.


Change-Id: Ifc8a01057b12c9624ff89490778c0d2c626ffe48