The client has been completely rewritten in order to use cliff. The code
should be easier to maintain: authentication is now entirely handled by
keystoneauth, CloudKitty's client and CK's OSC plugin use the exact same
classes (no code duplication).
New features for users:
* Client-side CSV report generation: It is possible for users to generate
CSV reports with the new client. There is a default format, but reports
may also be configured through a yaml config file. (see documentation)
* The documentation has been improved. (A few examples on how to use the
python library + complete API bindings and CLI reference).
* It is now possible to use the client without Keystone authentication (this
requires that CK's API is configured to use the noauth auth strategy).
* Various features are brought by cliff: completion, command output formatting
(table, shell, yaml, json...).
New features for developpers:
* Python 2.7/3.5 compatible 'python-cloudkittyclient' module.
* Integration tests (for 'openstack rating' and 'cloudkitty') have been
added. These allow to create gate jobs running against a CK devstack
* Tests are now ran with stestr instead of testr, which allows a better
control over execution.
* The dependency list has been reduced and upper constraints have been set.
Change-Id: I7c6afa46138d499b37b8be3d049b23ab5302a928
Task: 6589
Story: 2001614