openstack.cli: autogenerate docs

$namespace = openstack.cli

The subcommand documents for $namespace were hardcoded and thus prone to
drift over time. This commit removes the hardcoded content and uses the
autoprogram-cliff directive to generate them automatically from the
subcommand configuration classes.

Change-Id: I1f7e9d0e5748f887dbc35200c3c8b4407da43e0b

doc/source/cli/command-objects/command.rst

@@ -6,18 +6,5 @@ Internal
 
 Installed commands in the OSC process.
 
-command list
-------------
-
-List recognized commands by group
-
-.. program:: command list
-.. code:: bash
-
-    openstack command list
-        [--group <group-keyword>]
-
-.. option:: --group <group-keyword>
-
-    Show commands filtered by a command group, for example: identity, volume,
-    compute, image, network and other keywords
+.. autoprogram-cliff:: openstack.cli
+   :command: command *

doc/source/cli/command-objects/module.rst

@@ -6,17 +6,5 @@ Internal
 
 Installed Python modules in the OSC process.
 
-module list
------------
-
-List module versions
-
-.. program:: module list
-.. code:: bash
-
-    openstack module list
-        [--all]
-
-.. option:: --all
-
-    Show all modules that have version information
+.. autoprogram-cliff:: openstack.cli
+   :command: module *