Added Models App, Installation Batch Installation

spec/models/app.rb

@@ -0,0 +1,11 @@
+require 'rails_helper'
+
+RSpec.describe App, type: :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+
+  let!(:app) { create(:app) }
+
+  it { should validate_presence_of :name }
+  it { should validate_presence_of :package_name } 
+
+end