Bug 1370240

When trying to validate the Overcloud with Tempest as described in our documentation at https://access.redhat.com/documentation/en/red-hat-openstack-platform/9/single/director-installation-and-usage#sect-Validating_the_Overcloud and after having installed openstack-tempest the tests can't be run due to "ImportError: cannot import name test_utils"

[stack@undercloud-1 tempest]$ rpm -q python-manila-tests.noarch
python-manila-tests-2.0.0-5.el7ost.noarch
[stack@undercloud-1 tempest]$ rpm -q openstack-manila
openstack-manila-2.0.0-5.el7ost.noarch
[stack@undercloud-1 tempest]$ testr list-tests
running=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-500} \
OS_TEST_LOCK_PATH=${OS_TEST_LOCK_PATH:-${TMPDIR:-'/tmp'}} \
${PYTHON:-python} -m subunit.run discover -t ${OS_TOP_LEVEL:-./} ${OS_TEST_PATH:-./tempest/test_discover} --list
/usr/lib/python2.7/site-packages/tempest_lib/__init__.py:28: DeprecationWarning: tempest-lib is deprecated for future bug-fixes and code changes in favor of tempest. Please change your imports from tempest_lib to tempest.lib
  DeprecationWarning)
--- import errors ---
Failed to import test module: manila_tempest_tests.tests.scenario.test_share_basic_ops
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/unittest2/loader.py", line 445, in _find_test_path
    module = self._get_module_from_name(name)
  File "/usr/lib/python2.7/site-packages/unittest2/loader.py", line 384, in _get_module_from_name
    __import__(name)
  File "/usr/lib/python2.7/site-packages/manila_tempest_tests/tests/scenario/test_share_basic_ops.py", line 19, in <module>
    from tempest.lib.common.utils import test_utils
ImportError: cannot import name test_utils
Non-zero exit code (2) from test listing.

I have tried to skip the manila tests adding "manila = False" in the section "[service_available]" in etc/tempest.conf but it still fails.

A similar behaviour is reported in https://bugzilla.redhat.com/show_bug.cgi?id=1293840 although the import error comes from "isolated_creds" instead of "test_utils".