Add support for consul name resolution with grpc

examples/Leaf/input/config_go_consul.json

+{
+    "app_name" : "leaf",
+    "src_dir" : "examples/Leaf/input/input_go",
+    "output_dir" : "examples/Leaf/output_go_consul",
+    "wiring_file" : "examples/Leaf/wiring/instances_consul.py",
+    "target" : "go",
+    "addresses": [
+        {
+            "name" : "leafService",
+            "address" : "leafService",
+            "port" : 9500
+        },
+        {
+            "name" : "nonleafService",
+            "address" : "nonleafService",
+            "port" : 9501
+        },
+        {
+            "name" : "webService",
+            "address" : "webService",
+            "port" : 9502
+        },
+	    {
+	        "name" : "jaegerTracer",
+	        "address": "jaegerTracer",
+	        "port": 14268 
+	    },
+        {
+            "name" : "consul",
+            "address" : "consul",
+            "port" : 8500
+        }
+    ],
+    "inventory":[]
+}