Fix static-analysis failures with BeSuccessMatcher

Closes https://gitlab.com/gitlab-org/gitlab-ee/issues/14001

ee/spec/controllers/groups/cycle_analytics/events_controller_spec.rb

@@ -36,7 +36,7 @@ describe Groups::CycleAnalytics::EventsController do
             },
             format: :json)
 
-        expect(response).to be_success
+        expect(response).to be_successful
       end
 
       it 'calls service with specific params' do
@@ -55,7 +55,7 @@ describe Groups::CycleAnalytics::EventsController do
             },
             format: :json)
 
-        expect(response).to be_success
+        expect(response).to be_successful
       end
     end
 

ee/spec/controllers/groups/cycle_analytics_controller_spec.rb

@@ -36,7 +36,7 @@ describe Groups::CycleAnalyticsController do
             },
             format: :json)
 
-        expect(response).to be_success
+        expect(response).to be_successful
       end
 
       it 'calls service with specific params' do
@@ -56,7 +56,7 @@ describe Groups::CycleAnalyticsController do
             },
             format: :json)
 
-        expect(response).to be_success
+        expect(response).to be_successful
       end
     end
 

ee/spec/controllers/projects/merge_requests_controller_spec.rb

@@ -24,7 +24,7 @@ shared_examples 'approvals' do
     it 'approves the merge request' do
       approvals = json_response
 
-      expect(response).to be_success
+      expect(response).to be_successful
       expect(approvals['approvals_left']).to eq 1
       expect(approvals['approved_by'].size).to eq 1
       expect(approvals['approved_by'][0]['user']['username']).to eq user.username
@@ -53,7 +53,7 @@ shared_examples 'approvals' do
 
       approvals = json_response
 
-      expect(response).to be_success
+      expect(response).to be_successful
       expect(approvals['approvals_left']).to eq 1
       expect(approvals['approved_by'].size).to eq 1
       expect(approvals['approved_by'][0]['user']['username']).to eq approver.username
@@ -80,7 +80,7 @@ shared_examples 'approvals' do
     it 'unapproves the merge request' do
       approvals = json_response
 
-      expect(response).to be_success
+      expect(response).to be_successful
       expect(approvals['approvals_left']).to eq 2
       expect(approvals['approved_by']).to be_empty
       expect(approvals['user_has_approved']).to be false