infrakit: Move the hyperkit instance plugin into the source directory

- The tools directory ideally should not contain source code
- Removes double vendoring of packagages
- Makes it easer to hook the build into the top-level Makefile

Eventually, the plugin should be moved to the infrakit repo.

Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>

src/cmd/infrakit-instance-hyperkit/hyperkit.json

@@ -0,0 +1,30 @@
+{
+    "ID": "cattle",
+    "Properties": {
+        "Allocation": {
+            "Size": 1
+        },
+        "Instance": {
+            "Plugin": "instance-hyperkit",
+            "Properties": {
+                "Moby": "../../moby",
+                "Disk" : 512,
+                "CPUs" : 2,
+                "Memory" : 1024
+            }
+        },
+        "Flavor": {
+            "Plugin": "flavor-vanilla",
+            "Properties": {
+                "Init": [
+                    "test1",
+                    "test2"
+                ],
+                "Tags": {
+                    "tier": "sample",
+                    "project": "infrakit"
+                }
+            }
+        }
+    }
+}