Add HTTP API contract fixtures

tests/fixtures/http_api/temp_clear_response.json

@@ -0,0 +1,18 @@
+{
+  "device_name": "Cargo Controller",
+  "relays": [],
+  "bms": {
+    "enabled": true,
+    "name": "House Battery",
+    "address": "aa:bb:cc:dd:ee:ff",
+    "address_type": "public"
+  },
+  "temperature_sensors": [
+    {
+      "id": "temp_1",
+      "name": "Cabin",
+      "address": "",
+      "enabled": false
+    }
+  ]
+}