tc-testing: add support for sending various scapy packets

It can be worth sending different scapy packets on a given test, as in the
last patch of this series. For that, lets listify the scapy attribute and
simply iterate over it.
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/tc-testing/plugin-lib/scapyPlugin.py

@@ -29,7 +29,11 @@ class SubPlugin(TdcPlugin):
             return
 
         # Check for required fields
-        scapyinfo = self.args.caseinfo['scapy']
+        lscapyinfo = self.args.caseinfo['scapy']
+        if type(lscapyinfo) != list:
+            lscapyinfo = [ lscapyinfo, ]
+
+        for scapyinfo in lscapyinfo:
             scapy_keys = ['iface', 'count', 'packet']
             missing_keys = []
             keyfail = False