Changed location to locations in json files in topos

Change-Id: Iebe2ae9dfc7937e2199e4038488559c2fbc8014c
diff --git a/tools/test/topos/oe-linear-3.json b/tools/test/topos/oe-linear-3.json
index 44fccd9..8ea9899 100644
--- a/tools/test/topos/oe-linear-3.json
+++ b/tools/test/topos/oe-linear-3.json
@@ -42,7 +42,7 @@
     ],
 
     "hosts" : [
-        { "mac": "00:00:00:00:00:01", "vlan": -1, "location": "of:0000ffffffff0001/1", "ip": "10.0.0.1" },
-        { "mac": "00:00:00:00:00:02", "vlan": -1, "location": "of:0000ffffffff0002/1", "ip": "10.0.0.2" }
+        { "mac": "00:00:00:00:00:01", "vlan": -1, "locations": ["of:0000ffffffff0001/1"], "ip": "10.0.0.1" },
+        { "mac": "00:00:00:00:00:02", "vlan": -1, "locations": ["of:0000ffffffff0002/1"], "ip": "10.0.0.2" }
     ]
-}
\ No newline at end of file
+}