tests: fixing pim6 topotest bugs

- Remove use of bespoke socat
- Use ipv6 support in mcast-tester.py
- do not run processes in the background behind munet/micronet's
  back with `&` (ever) -- use popen or the helper class

Signed-off-by: Christian Hopps <chopps@labn.net>

1 files changed, 6 insertions, 6 deletions

diff --git a/tests/topotests/lib/pim.py b/tests/topotests/lib/pim.py
index e26bdb3af3..f69718a5bd 100644
--- a/tests/topotests/lib/pim.py
+++ b/tests/topotests/lib/pim.py
@@ -1,35 +1,35 @@
+# -*- coding: utf-8 eval: (blacken-mode 1) -*-
 # SPDX-License-Identifier: ISC
 # Copyright (c) 2019 by VMware, Inc. ("VMware")
 # Used Copyright (c) 2018 by Network Device Education Foundation, Inc.
 # ("NetDEF") in this file.
 
 import datetime
+import functools
 import os
 import re
 import sys
 import traceback
-import functools
 from copy import deepcopy
 from time import sleep
-from lib import topotest
-
 
 # Import common_config to use commomnly used APIs
 from lib.common_config import (
-    create_common_configurations,
     HostApplicationHelper,
     InvalidCLIError,
     create_common_configuration,
-    InvalidCLIError,
+    create_common_configurations,
+    get_frr_ipv6_linklocal,
     retry,
     run_frr_cmd,
     validate_ip_address,
-    get_frr_ipv6_linklocal,
 )
 from lib.micronet import get_exec_path
 from lib.topolog import logger
 from lib.topotest import frr_unicode
 
+from lib import topotest
+
 ####
 CWD = os.path.dirname(os.path.realpath(__file__))