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, 3 insertions, 3 deletions

diff --git a/spec/controllers/users_controller_spec.rb b/spec/controllers/users_controller_spec.rb
index 8b8d4c57000..5566df0c216 100644
--- a/spec/controllers/users_controller_spec.rb
+++ b/spec/controllers/users_controller_spec.rb
@@ -19,7 +19,7 @@ describe UsersController do
         it 'renders the show template' do
           get :show, params: { username: user.username }
 
-          expect(response).to be_success
+          expect(response).to be_successful
           expect(response).to render_template('show')
         end
       end
@@ -362,7 +362,7 @@ describe UsersController do
             it 'responds with success' do
               get :show, params: { username: user.username }
 
-              expect(response).to be_success
+              expect(response).to be_successful
             end
           end
 
@@ -418,7 +418,7 @@ describe UsersController do
             it 'responds with success' do
               get :projects, params: { username: user.username }
 
-              expect(response).to be_success
+              expect(response).to be_successful
             end
           end