test: consolidate the multiple versions of send_and_*

Change-Id: I7fa7d0ebf73dab8264a2e5ddbd412600d78ead05
Signed-off-by: Neale Ranns <nranns@cisco.com>
diff --git a/test/test_mpls.py b/test/test_mpls.py
index 9590519..aa5e674 100644
--- a/test/test_mpls.py
+++ b/test/test_mpls.py
@@ -314,13 +314,6 @@
         except:
             raise
 
-    def send_and_assert_no_replies(self, intf, pkts, remark):
-        intf.add_stream(pkts)
-        self.pg_enable_capture(self.pg_interfaces)
-        self.pg_start()
-        for i in self.pg_interfaces:
-            i.assert_nothing_captured(remark=remark)
-
     def test_swap(self):
         """ MPLS label swap tests """
 
@@ -1218,7 +1211,13 @@
         #
         tx = self.create_stream_labelled_ip6(self.pg0, [34], 255,
                                              dst_ip="ff01::1", hlim=1)
-        self.send_and_assert_no_replies(self.pg0, tx, "Hop Limt Expired")
+        self.pg0.add_stream(tx)
+
+        self.pg_enable_capture(self.pg_interfaces)
+        self.pg_start()
+
+        rx = self.pg0.get_capture(257)
+        self.verify_capture_ip6_icmp(self.pg0, rx, tx)
 
         #
         # set the RPF-ID of the enrtry to not match the input packet's
@@ -1258,14 +1257,6 @@
         self.pg0.disable_mpls()
         super(TestMPLSDisabled, self).tearDown()
 
-    def send_and_assert_no_replies(self, intf, pkts, remark):
-        intf.add_stream(pkts)
-        self.pg_enable_capture(self.pg_interfaces)
-        self.pg_start()
-        for i in self.pg_interfaces:
-            i.get_capture(0)
-            i.assert_nothing_captured(remark=remark)
-
     def test_mpls_disabled(self):
         """ MPLS Disabled """