adjust test for manifest push:

options {key:nil} should not modify the existing value

Author: a18e

spec/request/space_manifests_spec.rb

@@ -769,7 +769,7 @@
           expect(app1_model.routes.first.options).to eq({ 'lb_algo' => 'round-robin' })
         end
 
-        it 'removes a specific route option when options: { key: nil } is provided' do
+        it 'does not modify any option when options: { key: nil } is provided' do
           yml_manifest = {
             'applications' => [
               { 'name' => app1_model.name,
@@ -791,7 +791,7 @@
           Delayed::Worker.new.work_off
           expect(VCAP::CloudController::PollableJobModel.find(guid: job_guid)).to be_complete, VCAP::CloudController::PollableJobModel.find(guid: job_guid).cf_api_error
           app1_model.reload
-          expect(app1_model.routes.first.options).to eq({})
+          expect(app1_model.routes.first.options).to eq({ 'lb_algo' => 'round-robin' })
         end
       end