Change `be_success` to `be_successful` in specsfix-deprecation-warnings-change-success-to-successful

Fixes deprecation warning:

```
DEPRECATION WARNING: The success? predicate is deprecated and
will be removed in Rails 6.0.
Please use successful? as provided by Rack::Response::Helpers.
```

1 files changed, 2 insertions, 6 deletions

diff --git a/spec/controllers/projects/ci/lints_controller_spec.rb b/spec/controllers/projects/ci/lints_controller_spec.rb
index 96e82b7086c..14128fb5b0e 100644
--- a/spec/controllers/projects/ci/lints_controller_spec.rb
+++ b/spec/controllers/projects/ci/lints_controller_spec.rb
@@ -20,9 +20,7 @@ describe Projects::Ci::LintsController do
         get :show, params: { namespace_id: project.namespace, project_id: project }
       end
 
-      it 'is success' do
-        expect(response).to be_success
-      end
+      it { expect(response).to be_successful }
 
       it 'renders show page' do
         expect(response).to render_template :show
@@ -78,9 +76,7 @@ describe Projects::Ci::LintsController do
         post :create, params: { namespace_id: project.namespace, project_id: project, content: content }
       end
 
-      it 'is success' do
-        expect(response).to be_success
-      end
+      it { expect(response).to be_successful }
 
       it 'render show page' do
         expect(response).to render_template :show