tests: refactor. Replace literal constant w/ named constant.

* change literal packet count vlaues from 65 to a named constant of 67.
  (This value was recommended to exercise single, dual, and quad loops)

Change-Id: Ieb1738dddacb8b6ea7fa25883032ac01a98399e1
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>
diff --git a/test/test_neighbor.py b/test/test_neighbor.py
index c6d9fc6..6f781ff 100644
--- a/test/test_neighbor.py
+++ b/test/test_neighbor.py
@@ -17,6 +17,9 @@
 from scapy.contrib.mpls import MPLS
 from scapy.layers.inet6 import IPv6
 
+
+NUM_PKTS = 67
+
 # not exported by scapy, so redefined here
 arp_opts = {"who-has": 1, "is-at": 2}
 
@@ -1480,14 +1483,14 @@
               UDP(sport=1234, dport=1234) /
               Raw())
 
-        rx = self.send_and_expect(self.pg0, p1 * 65, self.pg1)
-        rx = self.send_and_expect(self.pg0, p2 * 65, self.pg1)
+        rx = self.send_and_expect(self.pg0, p1 * NUM_PKTS, self.pg1)
+        rx = self.send_and_expect(self.pg0, p2 * NUM_PKTS, self.pg1)
 
-        self.assertEqual(65, arp1.get_stats()['packets'])
-        self.assertEqual(65, arp2.get_stats()['packets'])
+        self.assertEqual(NUM_PKTS, arp1.get_stats()['packets'])
+        self.assertEqual(NUM_PKTS, arp2.get_stats()['packets'])
 
-        rx = self.send_and_expect(self.pg0, p1 * 65, self.pg1)
-        self.assertEqual(130, arp1.get_stats()['packets'])
+        rx = self.send_and_expect(self.pg0, p1 * NUM_PKTS, self.pg1)
+        self.assertEqual(NUM_PKTS*2, arp1.get_stats()['packets'])
 
     def test_nd_stats(self):
         """ ND Counters """
@@ -1525,8 +1528,8 @@
         self.assertEqual(16, nd1.get_stats()['packets'])
         self.assertEqual(16, nd2.get_stats()['packets'])
 
-        rx = self.send_and_expect(self.pg1, p1 * 65, self.pg0)
-        self.assertEqual(81, nd1.get_stats()['packets'])
+        rx = self.send_and_expect(self.pg1, p1 * NUM_PKTS, self.pg0)
+        self.assertEqual(NUM_PKTS+16, nd1.get_stats()['packets'])
 
 
 if __name__ == '__main__':