Use static uplink vlans (configurable) if the device is not found in the uplink map for the subscriber.
Plus other misc. changes related to voltha config

Change-Id: Icf2548af82229e984f16005950a34a73bdcd9cbc
diff --git a/src/test/voltha/volthaTest.json b/src/test/voltha/volthaTest.json
index d397700..6ad9afd 100644
--- a/src/test/voltha/volthaTest.json
+++ b/src/test/voltha/volthaTest.json
@@ -2,5 +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" : 8881,
+    "VOLTHA_UPLINK_VLAN_START" : 444
 }