center: add delete command

command to delete center
ogcli delete center --id <center id>

To delete the center with id 6

$ ogcli delete center --id 6

cli/cli.py

@@ -196,7 +196,7 @@ class OgCLI():
             OgImage.update_image(self.rest, args[1:])
 
     def delete(self, args):
-        choices = ['server']
+        choices = ['server', 'center']
         parser = argparse.ArgumentParser(prog='ogcli delete')
         parser.add_argument('delete_obj', choices=choices)
 
@@ -208,6 +208,8 @@ class OgCLI():
         parsed_args = parser.parse_args([args[0]])
         if parsed_args.delete_obj == 'server':
             OgServer.delete_server(self.rest, args[1:])
+        elif parsed_args.delete_obj == 'center':
+            OgCenter.delete_center(self.rest, args[1:])
 
     def add(self, args):
         choices = ['server', 'repo', 'center']

cli/objects/center.py

@@ -18,3 +18,13 @@ class OgCenter():
             payload['comment'] = parsed_args.comment
         rest.post('/center/add', payload=payload)
 
+    @staticmethod
+    def delete_center(rest, args):
+        parser = argparse.ArgumentParser(prog='ogcli delete center')
+        parser.add_argument('--id',
+                            nargs='?',
+                            required=True,
+                            help='center id in database')
+        parsed_args = parser.parse_args(args)
+        payload = {'id': parsed_args.id}
+        rest.post('/center/delete', payload=payload)