Fix failin shared dashbaord examples

::Gitlab::Metrics::Dashboard::Processor call wasn't stubbed
in all shared examples for dashbaord clonning process
which caused them to break with changes made to dashboard yml file

spec/support/shared_examples/services/metrics/dashboard_shared_examples.rb

@@ -67,6 +67,7 @@ RSpec.shared_examples 'valid dashboard cloning process' do |dashboard_template,
 
     it 'delegates commit creation to Files::CreateService', :aggregate_failures do
       service_instance = instance_double(::Files::CreateService)
+      allow(::Gitlab::Metrics::Dashboard::Processor).to receive(:new).and_return(double(process: file_content_hash))
       expect(::Files::CreateService).to receive(:new).with(project, user, dashboard_attrs).and_return(service_instance)
       expect(service_instance).to receive(:execute).and_return(status: :success)