Allow anyone to approve if no rule exists

Update spec

ee/app/models/approval_state.rb

@@ -65,7 +65,7 @@ class ApprovalState
   end
 
   def any_approver_allowed?
-    approved?
+    regular_rules.empty? || approved?
   end
 
   def approvals_required

ee/spec/models/approval_state_spec.rb

@@ -189,6 +189,17 @@ describe ApprovalState do
     end
 
     describe '#any_approver_allowed?' do
+      context 'when no rules' do
+        it 'returns true' do
+          expect(subject.any_approver_allowed?).to eq(true)
+        end
+      end
+
+      context 'when with rules' do
+        before do
+          create_rule(approvals_required: 1, users: [approver1])
+        end
+
         context 'when approved' do
           before do
             allow(subject).to receive(:approved?).and_return(true)
@@ -209,6 +220,7 @@ describe ApprovalState do
           end
         end
       end
+    end
 
     describe '#approvals_left' do
       before do