Change the default value of description of type show

When exec CLI command: manila type-show {type_id}
Currently, although the description of share type API in the response
body, but it has been replaced by None(default) in manilaclient.

Closes-Bug:#1830677
Co-Authored-By: Brin Zhang <zhangbailin@inspur.com>

Change-Id: I35b60496788ed752d605b289d994f3407ebb8388

manilaclient/tests/unit/v2/fakes.py

@@ -927,6 +927,7 @@ class FakeHTTPClient(fakes.FakeHTTPClient):
         return (200, {}, {
             'share_type': {'id': 1,
                            'name': 'test-type-1',
+                           'description': "test share type desc",
                            'extra_specs': {'test': 'test'},
                            'required_extra_specs': {'test': 'test'}}})
 

manilaclient/v2/shell.py

@@ -170,7 +170,7 @@ def _print_type_show(stype, default_share_type=None):
         'name': stype.name,
         'visibility': _is_share_type_public(stype),
         'is_default': is_default,
-        'description': None,
+        'description': stype.description,
         'required_extra_specs': _print_type_required_extra_specs(stype),
         'optional_extra_specs': _print_type_optional_extra_specs(stype),
     }

releasenotes/notes/bug-1830677-fix-13b30d6a89f43246.yaml

@@ -0,0 +1,6 @@
+---
+fixes:
+  - |
+    `Launchpad bug 1830677 <https://bugs.launchpad.net/python-manilaclient/+bug/1830677>`_
+    has been fixed and the client now correctly get description of share type
+    instead of ``None``.