python3-scapy: fix ptests

1. Enable network access during tests by setting a nameserver
2. Add missing tshark dependency
3. Install missing test files

Signed-off-by: Gyorgy Sarvari <skandigraun@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
+
 UTscapy3 -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:/'