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_dslite.py

@@ -1,54 +1,22 @@
 #!/usr/bin/env python3
 
 import socket
-import unittest
-import struct
-import random
 
-from framework import tag_fixme_vpp_workers
-from framework import VppTestCase, VppTestRunner
+from asfframework import tag_fixme_vpp_workers
+from framework import VppTestCase
 
-import scapy.compat
 from scapy.layers.inet import IP, TCP, UDP, ICMP
-from scapy.layers.inet import IPerror, TCPerror, UDPerror, ICMPerror
 from scapy.layers.inet6 import (
     IPv6,
     ICMPv6EchoRequest,
     ICMPv6EchoReply,
-    ICMPv6ND_NS,
-    ICMPv6ND_NA,
-    ICMPv6NDOptDstLLAddr,
-    fragment6,
 )
-from scapy.layers.inet6 import ICMPv6DestUnreach, IPerror6, IPv6ExtHdrFragment
-from scapy.layers.l2 import Ether, ARP, GRE
+from scapy.layers.l2 import Ether
 from scapy.data import IP_PROTOS
-from scapy.packet import bind_layers, Raw
-from util import ppp
-from ipfix import IPFIX, Set, Template, Data, IPFIXDecoder
-from time import sleep
-from util import ip4_range
-from vpp_papi import mac_pton
+from scapy.packet import Raw
 from syslog_rfc5424_parser import SyslogMessage, ParseError
-from syslog_rfc5424_parser.constants import SyslogFacility, SyslogSeverity
-from io import BytesIO
-from vpp_papi import VppEnum
-from vpp_ip_route import VppIpRoute, VppRoutePath, FibPathType
-from vpp_neighbor import VppNeighbor
-from scapy.all import (
-    bind_layers,
-    Packet,
-    ByteEnumField,
-    ShortField,
-    IPField,
-    IntField,
-    LongField,
-    XByteField,
-    FlagsField,
-    FieldLenField,
-    PacketListField,
-)
-from ipaddress import IPv6Network
+from syslog_rfc5424_parser.constants import SyslogSeverity
+from vpp_ip_route import VppIpRoute, VppRoutePath
 
 
 @tag_fixme_vpp_workers