scality: add export and name keys to os-initialize_connection info

Nova is standardizing on some of the common code for file system type
volume drivers in blueprint consolidate-libvirt-fs-volume-drivers and
expects the 'export' and 'name' keys to be in connection_info['data']
returned from the os-initialize_connection Cinder API.

The Scality volume driver wasn't providing these keys so those are added
here.

Related Nova change: I7db834956c67383e63be2fe2c465118e00273e4b

Closes-Bug: #1475419

Change-Id: I73938c51ac147dca5cf39765768f4ac078bf5e63

cinder/tests/unit/test_scality.py

@@ -221,6 +221,8 @@ class ScalityDriverTestCase(test.TestCase):
         self.assertEqual(ret['data']['sofs_path'],
                          os.path.join(self.TEST_VOLDIR,
                                       self.TEST_VOLNAME))
+        self.assertEqual(self.TEST_VOLDIR, ret['data']['export'])
+        self.assertEqual(self.TEST_VOLNAME, ret['data']['name'])
 
     def test_copy_image_to_volume(self):
         """Expected behaviour for copy_image_to_volume."""

cinder/volume/drivers/scality.py

@@ -212,6 +212,8 @@ class ScalityDriver(driver.VolumeDriver):
             'driver_volume_type': 'scality',
             'data': {
                 'sofs_path': self._sofs_path(volume),
+                'export': self.configuration.scality_sofs_volume_dir,
+                'name': volume['name'],
             }
         }