Adding P4D2_2018_East Folder (#116)

* Copying P4D2 Fall 2017 into P4D2 2018 East.

* Updated P4D2_2018_East VM.  Added vagrant URL workaround, cdrom to VM.  Updated to latest commits of BMV2, p4c, PI.  Known issue with p4runtime exercise.

* Applied patch from @antoninbas in  and updated solution

P4D2_2018_East/exercises/p4runtime/topology.json

@@ -0,0 +1,16 @@
+{
+    "hosts": [
+        "h1",
+        "h2",
+        "h3"
+    ],
+    "switches": {
+        "s1": {},
+        "s2": {},
+        "s3": {}
+    },
+    "links": [
+        ["h1", "s1"], ["s1", "s2"], ["s1", "s3"],
+        ["s3", "s2"], ["s2", "h2"], ["s3", "h3"]
+    ]
+}