fix(@angular/cli): fix text descriptions

Text of initial tests must have sense.

Close #5501

Author: vadim-shb

packages/@angular/cli/blueprints/component/files/__path__/__name__.component.spec.ts

@@ -19,7 +19,7 @@ describe('<%= classifiedModuleName %>Component', () => {
     fixture.detectChanges();
   });
 
-  it('should create', () => {
+  it('should be created', () => {
     expect(component).toBeTruthy();
   });
 });

packages/@angular/cli/blueprints/service/files/__path__/__name__.service.spec.ts

@@ -9,7 +9,7 @@ describe('<%= classifiedModuleName %>Service', () => {
     });
   });
 
-  it('should ...', inject([<%= classifiedModuleName %>Service], (service: <%= classifiedModuleName %>Service) => {
+  it('should be created', inject([<%= classifiedModuleName %>Service], (service: <%= classifiedModuleName %>Service) => {
     expect(service).toBeTruthy();
   }));
 });