hard to understand test failure if osprofiler is not available

[Christian Boltz]

novaclient uses try_import to import osprofiler.profiler and osprofiler.web:

    novaclient/client.py:osprofiler_profiler = importutils.try_import("osprofiler.profiler")
    novaclient/client.py:osprofiler_web = importutils.try_import("osprofiler.web")
    novaclient/shell.py:osprofiler_profiler = importutils.try_import("osprofiler.profiler")

Unfortunately two tests in novaclient/tests/unit/test_shell.py blindly expect that osprofiler.* is loaded - and fail with a hard-to understand error if it isn't:

    Failed 2 tests - output below:
    ==============================

    novaclient.tests.unit.test_shell.ShellTest.test_osprofiler
    ----------------------------------------------------------

    Captured traceback:
    ~~~~~~~~~~~~~~~~~~~
        Traceback (most recent call last):

          File "/usr/lib/python3.11/site-packages/requests_mock/mocker.py", line 317, in inner
        return func(*args, **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^

          File "/home/abuild/rpmbuild/BUILD/python-novaclient-18.6.0/novaclient/tests/unit/test_shell.py", line 665, in test_osprofiler
        self.shell('list --profile swordfish', (0, 2))

          File "/home/abuild/rpmbuild/BUILD/python-novaclient-18.6.0/novaclient/tests/unit/test_shell.py", line 397, in shell
        _shell.main(argstr.split())

          File "/home/abuild/rpmbuild/BUILD/python-novaclient-18.6.0/novaclient/shell.py", line 660, in main
        self.cs = client.Client(
                  ^^^^^^^^^^^^^^

          File "/home/abuild/rpmbuild/BUILD/python-novaclient-18.6.0/novaclient/tests/unit/test_shell.py", line 662, in client
        self.assertEqual('swordfish', kwargs['profile'])
                                      ~~~~~~^^^^^^^^^^^

        KeyError: 'profile'

    novaclient.tests.unit.test_shell.ShellTestKeystoneV3.test_osprofiler
    --------------------------------------------------------------------

    Captured traceback:
    ~~~~~~~~~~~~~~~~~~~
        Traceback (most recent call last):

          File "/usr/lib/python3.11/site-packages/requests_mock/mocker.py", line 317, in inner
        return func(*args, **kwargs)
               ^^^^^^^^^^^^^^^^^^^^^

          File "/home/abuild/rpmbuild/BUILD/python-novaclient-18.6.0/novaclient/tests/unit/test_shell.py", line 665, in test_osprofiler
        self.shell('list --profile swordfish', (0, 2))

          File "/home/abuild/rpmbuild/BUILD/python-novaclient-18.6.0/novaclient/tests/unit/test_shell.py", line 397, in shell
        _shell.main(argstr.split())

          File "/home/abuild/rpmbuild/BUILD/python-novaclient-18.6.0/novaclient/shell.py", line 660, in main
        self.cs = client.Client(
                  ^^^^^^^^^^^^^^

          File "/home/abuild/rpmbuild/BUILD/python-novaclient-18.6.0/novaclient/tests/unit/test_shell.py", line 662, in client
        self.assertEqual('swordfish', kwargs['profile'])
                                      ~~~~~~^^^^^^^^^^^

        KeyError: 'profile'

Please adjust the tests to either check if osprofiler.* is available and loaded, or at least add a check if kwargs['profile'] is set - and print a useful error message if it isn't.