This change implements the first storage backend for
ceilometer using MongoDB and makes it the default
(instead of 'log').
- require pymongo and ming for tests
- clean up entry point registration using textwrap
- sketch in a simple data dump tool (tools/show_data.py)
Change-Id: I0e3763749e88a71bc57b263ea79fff8d065c03ce
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>