fix(@angular/cli): add kjhtml reporter when testing with code coverage report

kjhtml reporter now displays when testing with code coverage report generation

Close angular#5136

Author: Colin McCulloch

packages/@angular/cli/blueprints/ng/files/karma.conf.js

@@ -32,7 +32,7 @@ module.exports = function (config) {
       environment: 'dev'
     },
     reporters: config.angularCli && config.angularCli.codeCoverage
-              ? ['progress', 'coverage-istanbul']
+              ? ['progress', 'kjhtml', 'coverage-istanbul']
               : ['progress', 'kjhtml'],
     port: 9876,
     colors: true,