Determines the subnet of given port by checking the interface config
directly

Previously, SR checked the subnet data structure which contains
multiple subnets now in order to support generic routing

Change-Id: Ib6e4b107583d9fd1bca248b31a6c437236560199
diff --git a/src/test/java/org/onosproject/segmentrouting/config/XConnectConfigTest.java b/src/test/java/org/onosproject/segmentrouting/config/XConnectConfigTest.java
index f472a90..143bc29 100644
--- a/src/test/java/org/onosproject/segmentrouting/config/XConnectConfigTest.java
+++ b/src/test/java/org/onosproject/segmentrouting/config/XConnectConfigTest.java
@@ -62,7 +62,7 @@
         InputStream invalidJsonStream = SegmentRoutingAppConfigTest.class
                 .getResourceAsStream("/xconnect-invalid.json");
 
-        String key = SegmentRoutingManager.SR_APP_ID;
+        String key = SegmentRoutingManager.APP_NAME;
         ApplicationId subject = new TestApplicationId(key);
         ObjectMapper mapper = new ObjectMapper();
         JsonNode jsonNode = mapper.readTree(jsonStream);