mgmt: add Mtu to faces/create and FaceStatus

refs #4005

Change-Id: I26c02aa088dc59aecd331cd579036177fef0f64c
diff --git a/tests/unit-tests/mgmt/nfd/face-status.t.cpp b/tests/unit-tests/mgmt/nfd/face-status.t.cpp
index 3cae12a..0ed7aca 100644
--- a/tests/unit-tests/mgmt/nfd/face-status.t.cpp
+++ b/tests/unit-tests/mgmt/nfd/face-status.t.cpp
@@ -45,6 +45,7 @@
       .setExpirationPeriod(10_s)
       .setBaseCongestionMarkingInterval(5_ns)
       .setDefaultCongestionThreshold(7)
+      .setMtu(9)
       .setNInInterests(10)
       .setNInData(200)
       .setNInNacks(1)
@@ -67,17 +68,17 @@
   //   printf("0x%02x, ", *it);
   // }
   static const uint8_t expected[] = {
-    0x80, 0x67, 0x69, 0x01, 0x64, 0x72, 0x15, 0x74, 0x63, 0x70,
+    0x80, 0x6a, 0x69, 0x01, 0x64, 0x72, 0x15, 0x74, 0x63, 0x70,
     0x34, 0x3a, 0x2f, 0x2f, 0x31, 0x39, 0x32, 0x2e, 0x30, 0x2e,
     0x32, 0x2e, 0x31, 0x3a, 0x36, 0x33, 0x36, 0x33, 0x81, 0x16,
     0x74, 0x63, 0x70, 0x34, 0x3a, 0x2f, 0x2f, 0x31, 0x39, 0x32,
     0x2e, 0x30, 0x2e, 0x32, 0x2e, 0x32, 0x3a, 0x35, 0x35, 0x35,
     0x35, 0x35, 0x6d, 0x02, 0x27, 0x10, 0x84, 0x01, 0x01, 0x85,
     0x01, 0x01, 0x86, 0x01, 0x01, 0x87, 0x01, 0x05, 0x88, 0x01,
-    0x07, 0x90, 0x01, 0x0a, 0x91, 0x01, 0xc8, 0x97, 0x01, 0x01,
-    0x92, 0x02, 0x0b, 0xb8, 0x93, 0x01, 0x04, 0x98, 0x01, 0x02,
-    0x94, 0x04, 0x4f, 0x41, 0xe7, 0x7b, 0x95, 0x04, 0x3b, 0x8d,
-    0x37, 0x30, 0x6c, 0x01, 0x07,
+    0x07, 0x89, 0x01, 0x09, 0x90, 0x01, 0x0a, 0x91, 0x01, 0xc8,
+    0x97, 0x01, 0x01, 0x92, 0x02, 0x0b, 0xb8, 0x93, 0x01, 0x04,
+    0x98, 0x01, 0x02, 0x94, 0x04, 0x4f, 0x41, 0xe7, 0x7b, 0x95,
+    0x04, 0x3b, 0x8d, 0x37, 0x30, 0x6c, 0x01, 0x07,
   };
   BOOST_CHECK_EQUAL_COLLECTIONS(expected, expected + sizeof(expected),
                                 wire.begin(), wire.end());
@@ -127,6 +128,7 @@
                     "     LinkType: multi-access,\n"
                     "     BaseCongestionMarkingInterval: 5 nanoseconds,\n"
                     "     DefaultCongestionThreshold: 7 bytes,\n"
+                    "     Mtu: 9 bytes,\n"
                     "     Flags: 0x7,\n"
                     "     Counters: {Interests: {in: 10, out: 3000},\n"
                     "                Data: {in: 200, out: 4},\n"