Redirect project members to scoped page

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

config/routes/project.rb

@@ -68,7 +68,7 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
         end
 
         namespace :settings do
-          get :members, to: redirect("%{namespace_id}/%{project_id}/project_members")
+          get :members, to: redirect("%{namespace_id}/%{project_id}/-/project_members")
 
           resource :ci_cd, only: [:show, :update], controller: 'ci_cd' do
             post :reset_cache

spec/routing/project_routing_spec.rb

@@ -488,6 +488,7 @@ describe 'project routing' do
     end
 
     it_behaves_like 'redirecting a legacy project path', "/gitlab/gitlabhq/project_members", "/gitlab/gitlabhq/-/project_members"
+    it_behaves_like 'redirecting a legacy project path', "/gitlab/gitlabhq/-/settings/members", "/gitlab/gitlabhq/-/project_members"
   end
 
   #     project_milestones    GET    /:project_id/milestones(.:format)          milestones#index