enable arguments in tox

enable positional arguments in tox to allow nose flags to be set as
well as a subset of test to be run.

Change-Id: I46815aa395f6cac5e1fd9cb103871bbde6b8518f
Open havana development, bump to 2013.2

Bump version to 2013.2 to start the havana development branch.

Change-Id: Ia31ddd338f144c858679cf46dbde01d36ef1cdc2
fix volume tests to utilize VOLUME_DELETE notification

fix the volume tests to use correct notification message and
test for more values.

Fixes: bug #1160511
Change-Id: I870619e13d5c5bc10515f0401b8d4d6466c0f9fb
Merge "enable arguments in tox"
Merge "fix volume tests to utilize VOLUME_DELETE notification"
Refactor DB tests

This is a big change but a necessary one. It moves all the database
connection stuff, even for test purpose, in
ceilometer.storage.impl_<backend> rather than redeclaring stuff inside the
tests.db module. That means less code and the possibility to run the API
test against various database backends for free.

Change-Id: I5e2ae2a2628de0d1e105c9d525c510fd356295d4
Signed-off-by: Julien Danjou <julien@danjou.info>
api: run max_resource_volume test on SQL backend

Change-Id: I7928da7d4ca10684de1f7bddac5e356c218d9725
Signed-off-by: Julien Danjou <julien@danjou.info>
Remove impl_test

Change-Id: If939bbaebf35a326076b6263f70248ff13975b45
Signed-off-by: Julien Danjou <julien@danjou.info>