Move eventlet to test-requirements. Remove greenlet.

The eventlet library is used in testing. Move it to
test-requirements.txt.

The greenlet library is not directly used. Remove it from
requirements.txt.

Make it more explicit which tests need the eventlet mock.

Change-Id: I117ec6a2ee4bb1a52e6de088cd1ddd5b0cce5efe

ironic_lib/tests/test_disk_partitioner.py

@@ -24,7 +24,6 @@ from ironic_lib import exception
 from ironic_lib import utils
 
 
-@mock.patch.object(eventlet.greenthread, 'sleep', lambda seconds: None)
 class DiskPartitionerTestCase(test_base.BaseTestCase):
 
     def test_add_partition(self):
@@ -74,6 +73,7 @@ class DiskPartitionerTestCase(test_base.BaseTestCase):
         mock_utils_exc.assert_called_once_with(
             'fuser', '/dev/fake', run_as_root=True, check_exit_code=[0, 1])
 
+    @mock.patch.object(eventlet.greenthread, 'sleep', lambda seconds: None)
     @mock.patch.object(disk_partitioner.DiskPartitioner, '_exec',
                        autospec=True)
     @mock.patch.object(utils, 'execute', autospec=True)
@@ -104,6 +104,7 @@ class DiskPartitionerTestCase(test_base.BaseTestCase):
             'fuser', '/dev/fake', run_as_root=True, check_exit_code=[0, 1])
         self.assertEqual(2, mock_utils_exc.call_count)
 
+    @mock.patch.object(eventlet.greenthread, 'sleep', lambda seconds: None)
     @mock.patch.object(disk_partitioner.DiskPartitioner, '_exec',
                        autospec=True)
     @mock.patch.object(utils, 'execute', autospec=True)
@@ -133,6 +134,8 @@ class DiskPartitionerTestCase(test_base.BaseTestCase):
             'fuser', '/dev/fake', run_as_root=True, check_exit_code=[0, 1])
         self.assertEqual(20, mock_utils_exc.call_count)
 
+    # Mock the eventlet.greenthread.sleep for the looping_call
+    @mock.patch.object(eventlet.greenthread, 'sleep', lambda seconds: None)
     @mock.patch.object(disk_partitioner.DiskPartitioner, '_exec',
                        autospec=True)
     @mock.patch.object(utils, 'execute', autospec=True)

requirements.txt

@@ -3,8 +3,6 @@
 # process, which may cause wedges in the gate later.
 
 pbr>=1.6 # Apache-2.0
-eventlet!=0.18.3,>=0.18.2 # MIT
-greenlet>=0.3.2 # MIT
 oslo.concurrency>=3.5.0 # Apache-2.0
 oslo.config>=3.4.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0

test-requirements.txt

@@ -4,6 +4,7 @@
 
 coverage>=3.6 # Apache-2.0
 discover # BSD
+eventlet!=0.18.3,>=0.18.2 # MIT
 hacking<0.11,>=0.10.0
 oslosphinx!=3.4.0,>=2.5.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0