CEC-2545 Fix/can signals context (#210)

src/services/__mocks__/vehiclesAPI.js

@@ -50,6 +50,14 @@ const ecusData = [
   },
 ];
 
+const signals = {data:[
+  {
+    timestamp: "2021-07-14T20:09:40.98187Z",
+    name: "signal",
+    value: 123
+  },
+]};
+
 const vehiclesAPI = {
   addVehicle: async (vehicle) => {
     data.push(vehicle);
@@ -105,6 +113,9 @@ const vehiclesAPI = {
     const index = data.findIndex(element => element.vin === vin);
     if (index >= 0) data[index] = vehicle;
     return vehicle;
+  },
+  getCANSignals: async (vin, vehicle) => {
+   return signals;
   }
 };