Improve active member test and query

ee/app/models/ee/member.rb

@@ -148,7 +148,7 @@ module EE
 
     def set_membership_activation
       return unless group
-      return if user && ::Member.in_hierarchy(group.root_ancestor).with_user(user).with_state(:active).limit(1).any?
+      return if user && ::Member.in_hierarchy(group).with_user(user).with_state(:active).any?
 
       self.state = ::Member::STATE_AWAITING if group.user_cap_reached?
     end

ee/spec/models/member_spec.rb

@@ -244,8 +244,8 @@ RSpec.describe Member, type: :model do
         context 'when the user is already an active project member' do
           it 'sets the group member to active' do
             create(:project_member, :active, project: project, user: user)
-            subgroup.add_owner(user)
 
+            expect { subgroup.add_owner(user) }.to change { ::Member.with_state(:active).count }.by(1)
             expect(user.group_members.last).to be_active
           end
         end