tests: refactor asf framework code

- Make framework.py classes a subset of asfframework.py classes
- Remove all packet related code from asfframework.py
- Add test class and test case set up debug output to log
- Repatriate packet tests from asf to test directory
- Remove non-packet related code from framework.py and
  inherit them from asfframework.py classes
- Clean up unused import variables
- Re-enable BFD tests on Ubuntu 22.04 and fix
  intermittent test failures in echo_looped_back
  testcases (where # control packets verified but
  not guaranteed to be received during test)
- Re-enable Wireguard tests on Ubuntu 22.04 and fix
  intermittent test failures in handshake ratelimiting
  testcases and event testcase
- Run Wiregard testcase suites solo
- Improve debug output in log.txt
- Increase VCL/LDP post sleep timeout to allow iperf server
  to finish cleanly.
- Fix pcap history files to be sorted by suite and testcase
  and ensure order/timestamp is correct based on creation
  in the testcase.
- Decode pcap files for each suite and testcase for all
  errors or if configured via comandline option / env var
- Improve vpp corefile detection to allow complete corefile
  generation
- Disable vm vpp interfaces testcases on debian11
- Clean up failed unittest dir when retrying failed testcases
  and unify testname directory and failed linknames into
  framwork functions

Type: test

Change-Id: I0764f79ea5bb639d278bf635ed2408d4d5220e1e
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>

test/test_dhcp.py

@@ -2,22 +2,19 @@
 
 import unittest
 import socket
-import struct
 import six
 
-from framework import VppTestCase, VppTestRunner
-from framework import tag_run_solo
+from framework import VppTestCase
+from asfframework import VppTestRunner, tag_run_solo
 from vpp_neighbor import VppNeighbor
 from vpp_ip_route import find_route, VppIpTable
 from util import mk_ll_addr
 import scapy.compat
-from scapy.layers.l2 import Ether, getmacbyip, ARP, Dot1Q
-from scapy.layers.inet import IP, UDP, ICMP
+from scapy.layers.l2 import Ether, ARP, Dot1Q
+from scapy.layers.inet import IP, UDP
 from scapy.layers.inet6 import IPv6, in6_getnsmac
-from scapy.utils6 import in6_mactoifaceid
 from scapy.layers.dhcp import DHCP, BOOTP, DHCPTypes
 from scapy.layers.dhcp6 import (
-    DHCP6,
     DHCP6_Solicit,
     DHCP6_RelayForward,
     DHCP6_RelayReply,
@@ -29,7 +26,7 @@ from scapy.layers.dhcp6 import (
     DHCP6OptClientLinkLayerAddr,
     DHCP6_Request,
 )
-from socket import AF_INET, AF_INET6, inet_pton, inet_ntop
+from socket import AF_INET, AF_INET6, inet_pton
 from scapy.utils6 import in6_ptop
 from vpp_papi import mac_pton, VppEnum
 from vpp_sub_interface import VppDot1QSubint