Peg the version of Ming used in tests

Up until today we have needed to use a git checkout of Ming
to get some changes we pushed upstream but that were not
released. Release 0.3.2 includes all of our changes, so we
can now update our requirements to use it and stop using
the git head.

Change-Id: I4a3c242259c279b1e1be86d280572dd8cd26e84e
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
Add Kwapi pollster (energy monitoring).

Given that my blueprint is not publicly available, I summarize it here.

Kwapi (kilowatt API) contains the following modules:
- Drivers: receive values from wattmeters and forward them on a bus (ZeroMQ).
Wattmeter drivers are specific to each wattmeters (Wattsup, OmegaWatt, etc).
- Plugins: listen the bus and process received data.
Currently, there is two plugins: the ceilometer plugin (REST API) and a visualization plugin (build graphs with RRDtool).

Kwapi is part of the XLcloud project (HPC cloud).
http://www.xlcloud.org

Repository:
https://github.com/stackforge/kwapi

Change-Id: Ieaaa1db9c8c569b6ee9f0815e03879f8b3f3e282
Merge "Add Kwapi pollster (energy monitoring)."
Merge "Peg the version of Ming used in tests"