Add backup create client support for freezer

Currently, freezer client doesnt support backup create command,
it is not so convenient. This patch add this command for debug.

Change-Id: I0313f431f066a59b6d57130b81e943bce300511b

freezerclient/shell.py

@@ -59,6 +59,7 @@ class FreezerCommandManager(commandmanager.CommandManager):
         'backup-list': backups.BackupList,
         'backup-show': backups.BackupShow,
         'backup-delete': backups.BackupDelete,
+        'backup-create': backups.BackupCreate,
         'session-list': sessions.SessionList,
         'session-show': sessions.SessionShow,
         'session-create': sessions.SessionCreate,

freezerclient/v2/backups.py

@@ -117,3 +117,19 @@ class BackupDelete(command.Command):
     def take_action(self, parsed_args):
         self.app.client.backups.delete(parsed_args.backup_uuid)
         logging.info('Backup {0} deleted'.format(parsed_args.backup_uuid))
+
+
+class BackupCreate(command.Command):
+    """Create an backup from a file"""
+    def get_parser(self, prog_name):
+        parser = super(BackupCreate, self).get_parser(prog_name)
+        parser.add_argument('--file',
+                            dest='file',
+                            required=True,
+                            help='Path to json file with the backup')
+        return parser
+
+    def take_action(self, parsed_args):
+        backup = utils.doc_from_json_file(parsed_args.file)
+        backup_id = self.app.client.backups.create(backup)
+        logging.info('Backup {0} created'.format(backup_id))