gnocchiclient 7.0.4

  * Using Python 3 for building the doc.

gnocchiclient 7.0.2

Remove hacking dependency for pep8

Hacking is not maintained and depends on an old flake8 version.
Switch to flake8 and a few standard extensions.

tests: remove testtools and fixtures dependencies

Support Python 3.7 instead of 3.5

exeptions: fix matching when description is a dict

shell: fix OS_AUTH_TYPE workaround

Always use proxy method to get client

some methods were missing it, breaking respective openstackclient
commands.

Issue: #87

Update mergify configuration

Enable mergify

We recently uses local TZ, when timestamps doesn't have a TZ.
But Gnocchi client was passing the string as-is before allowing
all kind of timestamps that the server support (like +2hour, now, ...).

This change restores this feature.

This has a typo and is not actually useful. Remove it.

This patch remove usage of os_doc_tools.command and utilizes
cliff.sphinxext with minor modification.

The modification is required because original CommandManager
does not see gnocchi commands for some reason.

Fixes issue #80.