Move cord-tester voltha rest interface to use envoy.
Plus other misc. changes

Change-Id: I03c40841ef07d9c0523799dc2efbd7e0caa1e536
diff --git a/src/test/voltha/volthaTest.json b/src/test/voltha/volthaTest.json
index 6ad9afd..6594e73 100644
--- a/src/test/voltha/volthaTest.json
+++ b/src/test/voltha/volthaTest.json
@@ -2,6 +2,6 @@
     "OLT_TYPE" : "simulated_olt",
     "OLT_MAC"  : "00:0c:e2:31:12:00",
     "VOLTHA_HOST" : "172.17.0.1",
-    "VOLTHA_REST_PORT" : 8881,
+    "VOLTHA_REST_PORT" : 8882,
     "VOLTHA_UPLINK_VLAN_START" : 444
 }