adds specs for respective behaviour

app/controllers/concerns/kaminari_pagination.rb

app/controllers/dashboard/todos_controller.rb

app/controllers/projects/issues_controller.rb

app/controllers/projects/merge_requests_controller.rb

app/controllers/projects/snippets_controller.rb

spec/controllers/dashboard/todos_controller_spec.rb

spec/controllers/projects/issues_controller_spec.rb

spec/controllers/projects/merge_requests_controller_spec.rb

spec/controllers/projects/snippets_controller_spec.rb