python3-scapy: fix ptests

1. Install missing test files
2. Enable network access by setting a nameserver in resolv.conf
   because some tests require this
3. One test tries to ping Google through IPv6 - this test requires
   ipv6 DISTRO_FEATURE. In case ipv6 is not enabled, skip this test
   from the run-ptest script.

NB: the last mentioned test to work  also requires IPv6 support from
your ISP. My ISP is IPv4-only, and I couldn't try it out. The above
comes from my reading of the testcode.

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-networking/recipes-devtools/python/python3-scapy/run-ptest

@@ -1,4 +1,11 @@
 #!/bin/sh
+
+if ! nslookup example.com; then
+  mv /etc/resolv.conf /etc/resolv.conf.bak
+  echo "nameserver 8.8.8.8" > /etc/resolv.conf
+  trap "mv /etc/resolv.conf.bak /etc/resolv.conf" INT EXIT
+fi
+
 python3 UTscapy.py -t regression.uts -f text -l -C \
     -o @PTEST_PATH@/scapy_ptest_$(date +%Y%m%d-%H%M%S).log \
     2>&1 | sed -e 's/^passed None/PASS:/' -e 's/^failed None/FAIL:/'