A role entity can now be specified as domain specific.

Closes-bug: #1606105
Change-Id: I564cf3da1d61f5bfcf85be591480d2f5c8d694a0

The current identity role list command (both v2 and v3) is
overloaded with listing roles as well as assignments (if you
provide user, group, project or domain options). This is in
addition to the v3 assignment list command designed for this
purpose.

This overloading complicates the fact that roles can now be
domain specific (i.e. have a domain attribute), so the
command 'role list --domain <domain-name' will soon become
ambigious (this is in a follow on patch).

This patch:

- Adds a v2 assignments list, with support for pulling the
user and project from the auth credentials
- For comapability, adds the same auth support to the
existing v3 assignments list
- Deprecates the use of role list and user role list to list
assignments

Change-Id: I65bafdef4f8c89e863dab101369d0d629fa818b8
Partial-Bug: 1605774

Leave command.py and test_command.py as a sanity check during the
deprecation period.

Change-Id: I24e1b755cbfbcbcaeb5273ec0c9706b82384fc85

Use osc-lib directly for utils.

Leave openstackclient.common.utils for deprecation period.

Change-Id: I5bd9579abc4e07f45219ccd0565626e6667472f7

Change-Id: I3b48d17850343051239b5b69e8b890dba32d3ac8
Partial-bug: #1574965

Nothing too complicated here.  I fixed a bunch of spacing issues
that I saw in OSC.

Change-Id: I935ab48e7c5bac5f88ecdb3a05f73fb44fc9f41d

Previously each command logs take_action parameters explicitly
by using @utils.log_method decorator or log.debug().
Some commands have no logging.

This commit calls a logger in the base class and
drops all logging definition from individual commands.

Closes-Bug: #1532294
Change-Id: I43cd0290a4353c68c075bade9571c940733da1be

Utilize the new include names functionality added to
list role assignments (GET /role_assignments?include_names=True).
Which will return the names of the entities instead of their
IDs.

Change-Id: I6dc03baf61ef9354a8a259a9f17ff47ce1665ce7
Depends-On: I4aa77c08660a0cbd021502155938a46121ca76ef
Closes-Bug: #1479569
Implements: blueprint list-assignment-with-names

Adds inherited information when listing role
assignments. In addition, it makes possible
to list only inherited ones by adding
--inherited option.

Change-Id: Idf889603d584716da95e2c7b4880142fbd8291c4
Closes-Bug: 1370546