Add entity-selector in default blueprint

app/controllers/entity-factory.js

app/templates/entity-factory.js

...aws-ehipster/files/__root__/controllers/entity-factory.js

...aws-ehipster/files/__root__/styles/ember-aws-ehipster.css

...-aws-ehipster/files/__root__/templates/entity-factory.hbs

blueprints/ember-aws-ehipster/index.js

blueprints/entity-factory/index.js

package.json