fix(generateComponentGroup processor): ensure doc has a name

Fixes angular/angular.js#8860

Author: petebacondarwin

ngdoc/processors/component-groups-generate.js

@@ -30,6 +30,7 @@ module.exports = {
           return {
             id: module.id + '.' + docType,
             docType: 'componentGroup',
+            name: docType + ' components in '  + module.id,
             groupType: docType,
             module: module.name,
             moduleDoc: module,

ngdoc/spec/processors/component-groups-generate.spec.js

@@ -23,6 +23,8 @@ describe("component-groups processor", function() {
     processor.process(docs, config, modules);
 
     expect(docs.length).toEqual(2);
+    expect(docs[0].name).toEqual('a components in mod1');
+    expect(docs[1].name).toEqual('b components in mod1');
   });