Mock BitsExpiration.expire_packages! in package_model tests

Author: jochenehret

spec/unit/models/runtime/package_model_spec.rb

@@ -2,6 +2,10 @@
 
 module VCAP::CloudController
   RSpec.describe PackageModel do
+    before do
+      allow_any_instance_of(BitsExpiration).to receive(:expire_packages!)
+    end
+
     describe 'validations' do
       it { is_expected.to validates_includes PackageModel::PACKAGE_STATES, :state, allow_missing: true }