Fix tests to run with mocha (#389)

test/consuming-services.test.js

@@ -1,8 +1,9 @@
 const cds = require('@sap/cds/lib')
-const { expect } = cds.test ('@capire/bookshop')
 
 describe('cap/samples - Consuming Services locally', () => {
-  //
+
+  const { expect } = cds.test ('@capire/bookshop')
+
   it('bootstrapped the database successfully', ()=>{
     const { AdminService } = cds.services
     const { Authors } = AdminService.entities