(vNet) fix:introduce virtual network service adapter

Introduced virtual network servic (and amdin) service adapter as
a effort to refactor the test codes.

Change-Id: I4c809d90a76a9d8d636610ac6d5308693e2ab204
diff --git a/incubator/net/BUCK b/incubator/net/BUCK
index 9790bed..8801df3 100644
--- a/incubator/net/BUCK
+++ b/incubator/net/BUCK
@@ -8,6 +8,7 @@
 ]
 
 TEST_DEPS = [
+    '//incubator/api:onos-incubator-api-tests',
     '//lib:TEST_REST',
     '//lib:TEST_ADAPTERS',
     '//core/api:onos-api-tests',