Refactor unit tests in identity v3 for "user", "endpoint", "group"
and "service" with fake classes.

Change-Id: I57316bbf762c805f8e9ae225b394bbe58ebdd416
Partially-Implements: blueprint refactor-identity-unit-test

if there are more than one services be found with one
name, a NoUniqueMatch exception should be raised but
we can see a NotFound Exception raised instead. It is
because in "find_service()", we use "find_resource()"
first, if "find_resource()" return a exception, we just
think it is a NotFound Exception and continue to find
by type but ignore a NoUniqueMatch exception of
"find_resource()". This patch refactor the "find_service()"
method to solve this problem.

Change-Id: Id4619092c57f276ae0698c89df0d5503b7423a4e
Co-Authored-By: Huanxuan Ao <huanxuan.ao@easystack.cn>
Closes-Bug:#1597296

Support bulk deletion for delete commands in the list below
identity/v3/consumer
identity/v3/credential
identity/v3/domain
identity/v3/ec2creds
identity/v3/endpoint
identity/v3/federation_protocol
identity/v3/identity_provider
identity/v3/mapping
identity/v3/policy
identity/v3/region
identity/v3/service_provider
identity/v3/service

The unit test in identityv3 need to be refactored, so I add
some functional tests instead. I will add all unit tests at
one time after the refactor completed.

Change-Id: I82367570f59817b47c87b6c7bfeae95ccfe5c50e
Closes-Bug: #1592906

Some of the unit tests test run(), but not take_action().

For example, in openstackclient/tests/volume/v1/test_volume.py, there is:

    def test_volume_set_size_smaller(self):
        ......

        result = self.cmd.run(parsed_args)

        self.assertEqual(0, result)
        ......

run() is defined in class Command in cliff. We don't need to test it in OSC
unit tests. On the contrary, we should test take_action(), which is
overwritten in each command classes in OSC.

Change-Id: If07e89953d40ac530f08cbb1ec05f5805171364b
Closes-bug: #1553468

As bug #1477199 describes, the wrong comment below is all over the
unit test code of OSC.

    # DisplayCommandBase.take_action() returns two tuples

There is no such class named DisplayCommandBase in OSC. It is in cliff.

All OSC command classes inherit from the base classes in cliff,
class Command, class Lister and class ShowOne. It is like this:

Object
|--> Command
     |--> DisplayCommandBase
          |--> Lister
          |--> ShowOne

take_action() is an abstract method of class Command, and generally is
overwritten by subclasses.
* Command.take_action() returns nothing.
* Lister.take_action() returns a tuple which contains a tuple of columns
  and a generator used to generate the data.
* ShowOne.take_action() returns an iterator which contains a tuple of
  columns and a tuple of data.

So, this problem should be fixed in 3 steps:
1. Remove all DisplayCommandBase comments for tests of classes inheriting
   from class Command in cliff as it returns nothing.
2. Fix all DisplayCommandBase comments for tests of classes inheriting
   from class Lister in cliff. Lister.take_action() returns a tuple and
   a generator.
3. Fix all DisplayCommandBase comments for tests of classes inheriting
   from class ShowOne in cliff. ShowOne.take_action() returns two tuples.

This patch finishes step 3 in all identity tests.

Change-Id: I1f05e833cdacd30915954e4220b6e1f16ac1ed40
Closes-bug: #1477199

As bug #1477199 describes, the wrong comment below is all over the
unit test code of OSC.

    # DisplayCommandBase.take_action() returns two tuples

There is no such class named DisplayCommandBase in OSC. It is in cliff.

All OSC command classes inherit from the base classes in cliff,
class Command, class Lister and class ShowOne. It is like this:

Object
|--> Command
     |--> DisplayCommandBase
          |--> Lister
          |--> ShowOne

take_action() is an abstract method of class Command, and generally is
overwritten by subclasses.
* Command.take_action() returns nothing.
* Lister.take_action() returns a tuple which contains a tuple of columns
  and a generator used to generate the data.
* ShowOne.take_action() returns an iterator which contains a tuple of
  columns and a tuple of data.

So, this problem should be fixed in 3 steps:
1. Remove all DisplayCommandBase comments for tests of classes inheriting
   from class Command in cliff as it returns nothing.
2. Fix all DisplayCommandBase comments for tests of classes inheriting
   from class Lister in cliff. Lister.take_action() returns a tuple and
   a generator.
3. Fix all DisplayCommandBase comments for tests of classes inheriting
   from class ShowOne in cliff. ShowOne.take_action() returns two tuples.

This patch finishes step 2 in all identity tests.

Change-Id: I2929ee688b1d7afc52c6ab325982bdc24c60a995
Partial-bug: #1477199

columns and datalist has been set in each test case in compute,
which is not necessary. This patch abstract it out and remove
all redundant code.

Change-Id: I45a3582088161f12e60e7c933da8e7dcc0ae8e7b
Closes-Bug: #1532384

Let's fix them thoroughly.

Change-Id: I8a1f042fb614b05c9836a49041f3883638b870b0

Changes to the 'service list' commands for Identity v2 and v3:
* Document support for --long
* Add Description to v3 output with --long
* v3 output is now (ID, Name, Type), with (Description, Enabled) added with --long
* Change v2 output to match v3 output, with the absense of Enabled.
* Update doc to match

Closes-Bug: #1411337
Change-Id: I999e3df22f61350cdeba63bbb7d01145c2ffeeaf

Change-Id: Ibf84882c9a9f408268c225190436fc1a534e1017
Closes-Bug: #1404997