v3: fix broken tests for revisions

[#173719526]

Co-authored-by: Harsha Nandiwada <hnandiwada@vmware.com>
Co-authored-by: Merric de Launey <mdelauney@pivotal.io>

Author: Harsha Nandiwada

spec/request/revisions_spec.rb

@@ -329,27 +329,31 @@
             created_at: '2020-05-26T18:47:01Z',
             updated_at: '2020-05-26T18:47:01Z',
             droplet: droplet,
+            description: '',
             app: app_model)
         }
         let!(:resource_2) {
           VCAP::CloudController::RevisionModel.create(
             created_at: '2020-05-26T18:47:02Z',
             updated_at: '2020-05-26T18:47:02Z',
             droplet: droplet,
+            description: '',
             app: app_model)
         }
         let!(:resource_3) {
           VCAP::CloudController::RevisionModel.create(
             created_at: '2020-05-26T18:47:03Z',
             updated_at: '2020-05-26T18:47:03Z',
             droplet: droplet,
+            description: '',
             app: app_model)
         }
         let!(:resource_4) {
           VCAP::CloudController::RevisionModel.create(
             created_at: '2020-05-26T18:47:04Z',
             updated_at: '2020-05-26T18:47:04Z',
             droplet: droplet,
+            description: '',
             app: app_model)
         }