Remove ember-welcome-page from mocha test

This is due to ember-cli/ember-welcome-page#385 which breaks `ember new`

Author: SergeAstapov

packages/ember-cli-fastboot/test/fastboot-config-test.js

@@ -23,6 +23,7 @@ describe('FastBoot config', function () {
       .then(function () {
         app.editPackageJSON((pkg) => {
           delete pkg.devDependencies['ember-fetch'];
+          delete pkg.devDependencies['ember-welcome-page'];
         });
         return app.run('npm', 'install');
       })

packages/ember-cli-fastboot/test/fastboot-location-config-test.js

@@ -23,6 +23,7 @@ describe('FastBootLocation Configuration', function () {
       .then(function () {
         app.editPackageJSON((pkg) => {
           delete pkg.devDependencies['ember-fetch'];
+          delete pkg.devDependencies['ember-welcome-page'];
         });
         return app.run('npm', 'install');
       })

packages/ember-cli-fastboot/test/fastboot-location-test.js

@@ -22,6 +22,7 @@ describe('FastBootLocation', function () {
       .then(function () {
         app.editPackageJSON((pkg) => {
           delete pkg.devDependencies['ember-fetch'];
+          delete pkg.devDependencies['ember-welcome-page'];
         });
         return app.run('npm', 'install');
       })

packages/ember-cli-fastboot/test/fixtures/customized-outputpaths/app/templates/application.hbs

@@ -0,0 +1,3 @@
+<h2 id="title">Welcome to Ember</h2>
+
+{{outlet}}

packages/ember-cli-fastboot/test/fixtures/fastboot-location-config/app/templates/application.hbs

@@ -0,0 +1,3 @@
+<h2 id="title">Welcome to Ember</h2>
+
+{{outlet}}

packages/ember-cli-fastboot/test/fixtures/fastboot-location/app/templates/application.hbs

@@ -0,0 +1,3 @@
+<h2 id="title">Welcome to Ember</h2>
+
+{{outlet}}

packages/ember-cli-fastboot/test/fixtures/request/app/templates/application.hbs

@@ -0,0 +1,3 @@
+<h2 id="title">Welcome to Ember</h2>
+
+{{outlet}}

packages/ember-cli-fastboot/test/package-json-test.js

@@ -25,6 +25,7 @@ describe('generating package.json', function () {
         .then(function () {
           customApp.editPackageJSON((pkg) => {
             delete pkg.devDependencies['ember-fetch'];
+            delete pkg.devDependencies['ember-welcome-page'];
           });
           return customApp.run('npm', 'install');
         })

packages/ember-cli-fastboot/test/request-details-test.js

@@ -17,6 +17,7 @@ function injectMiddlewareAddon(app) {
       paths: ['lib/post-middleware'],
     };
     delete pkg.devDependencies['ember-fetch'];
+    delete pkg.devDependencies['ember-welcome-page'];
   });
   return app.run('npm', 'install');
 }

packages/ember-cli-fastboot/test/root-url-test.js

@@ -23,6 +23,7 @@ describe('rootUrl acceptance', function () {
       .then(function () {
         app.editPackageJSON((pkg) => {
           delete pkg.devDependencies['ember-fetch'];
+          delete pkg.devDependencies['ember-welcome-page'];
         });
         return app.run('npm', 'install');
       })