unit_tests: do not base our tests on neutronclient

The python-neutronclient module that we were getting our base test class
from was intended to serve for tests that emulate command line input and
output and, as such, it took control of stdin and stdout.

It is inconvenient to have stdin and stdout captured because that
prevents the developers from printing or attaching debuggers when
running unit tests.

Change-Id: I729652d0b5bf8a852950535cce36195397165581
Closes-bug: #1626542
Signed-off-by: Antoni Segura Puimedon <antonisp@celebdor.com>

kuryr_libnetwork/tests/unit/base.py

@@ -10,7 +10,9 @@
 # License for the specific language governing permissions and limitations
 # under the License.
 
-from neutronclient.tests.unit import test_cli20
+from mox3 import mox
+from neutronclient.v2_0 import client
+from oslotest import base
 
 from kuryr.lib import binding
 from kuryr_libnetwork import app
@@ -19,7 +21,11 @@ from kuryr_libnetwork import controllers
 from kuryr_libnetwork import utils
 
 
-class TestCase(test_cli20.CLITestV20Base):
+TOKEN = 'testtoken'
+ENDURL = 'localurl'
+
+
+class TestCase(base.BaseTestCase):
     """Test case base class for all unit tests."""
 
     def setUp(self):
@@ -27,7 +33,7 @@ class TestCase(test_cli20.CLITestV20Base):
         app.config['DEBUG'] = True
         app.config['TESTING'] = True
         self.app = app.test_client()
-        self.app.neutron = self.client
+        self.app.neutron = client.Client(token=TOKEN, endpoint_url=ENDURL)
         app.tag = True
 
 
@@ -36,6 +42,7 @@ class TestKuryrBase(TestCase):
 
     def setUp(self):
         super(TestKuryrBase, self).setUp()
+        self.mox = mox.Mox()
         controllers.neutron_client()
         self.app.neutron.format = 'json'
         self.addCleanup(self.mox.VerifyAll)