Update server.js and check in expected results of ExposedServices

- `server.js` had a reference to a service that doesn't exist. Made it point to Service1 instead.
- Create expected results of `ExposedServices`, a complementary test to `RemoteFlowSource`.

Author: jeongsoolee09

javascript/frameworks/cap/test/models/cds/remoteflowsources/ExposedServices.expected

@@ -0,0 +1,20 @@
+| server.js:7:32:7:34 | req |
+| srv/service1.js:6:29:6:31 | req |
+| srv/service1.js:12:29:12:31 | req |
+| srv/service1.js:18:29:18:31 | req |
+| srv/service1.js:24:29:24:31 | req |
+| srv/service1.js:40:29:40:31 | req |
+| srv/service1.js:46:29:46:31 | req |
+| srv/service1.js:52:29:52:31 | req |
+| srv/service1.js:58:29:58:31 | req |
+| srv/service1.js:64:29:64:31 | req |
+| srv/service2.js:4:27:4:29 | msg |
+| srv/service3.js:5:29:5:31 | req |
+| srv/service3.js:11:29:11:31 | req |
+| srv/service3.js:17:29:17:31 | req |
+| srv/service3.js:23:29:23:31 | req |
+| srv/service3.js:39:29:39:31 | req |
+| srv/service3.js:45:29:45:31 | req |
+| srv/service3.js:51:29:51:31 | req |
+| srv/service3.js:57:29:57:31 | req |
+| srv/service3.js:63:29:63:31 | req |

javascript/frameworks/cap/test/models/cds/remoteflowsources/server.js

@@ -3,6 +3,6 @@ const app = require("express")();
 
 cds.serve("all").in(app);
 
-cds.serve('./some-service').with((srv) => {
+cds.serve('Service1').with((srv) => {
   srv.before('READ', 'Books', (req) => req.reply([])) // SAFE: Exposed service (fallback), but not a taint source
 })