Adds reset task status mgmt instance action

Partially implements: blueprint reset-task-status-mgmt-api

Change-Id: I54fa7a91f67910a95f217ea04f240d917e3121ec

reddwarfclient/management.py

@@ -124,3 +124,10 @@ class Management(base.ManagerWithFind):
         """
         body = {'update': {}}
         self._action(instance_id, body)
+
+    def reset_task_status(self, instance_id):
+        """
+        Set the task status to NONE.
+        """
+        body = {'reset-task-status': {}}
+        self._action(instance_id, body)

reddwarfclient/mcli.py

@@ -146,6 +146,11 @@ class InstanceCommands(common.AuthedCommandsBase):
         self._require('id')
         self._pretty_print(self.dbaas.management.migrate, self.id)
 
+    def reset_task_status(self):
+        """Set the instance's task status to NONE."""
+        self._require('id')
+        self._pretty_print(self.dbaas.management.reset_task_status, self.id)
+
 
 class StorageCommands(common.AuthedCommandsBase):
     """Commands to list devices info"""

tests/test_management.py

@@ -129,3 +129,9 @@ class ManagementTest(TestCase):
         self.management.update(1)
         self.assertEqual(1, self.management._action.call_count)
         self.assertEqual({'update': {}}, self.body_)
+
+    def test_reset_task_status(self):
+        self._mock_action()
+        self.management.reset_task_status(1)
+        self.assertEqual(1, self.management._action.call_count)
+        self.assertEqual({'reset-task-status': {}}, self.body_)