Fix describe for notes_finder_spec.rb in ee

It should be NotesFinder as that's the class we are testing. This
escaped detection by the FilePath cop because it was a string

Also, used described_class in the spec now.

ee/spec/finders/notes_finder_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-describe 'EE::NotesFinder' do
+describe NotesFinder do
   let(:group) { create(:group) }
   let(:user) { create(:group_member, :owner, group: group, user: create(:user)).user }
   let(:epic) { create(:epic, :opened, author: user, group: group) }
@@ -13,32 +13,32 @@ describe 'EE::NotesFinder' do
   end
 
   describe '#target' do
-    subject { NotesFinder.new(user, { target_id: epic.id, target_type: 'epic', group_id: group.id }).target }
+    subject { described_class.new(user, { target_id: epic.id, target_type: 'epic', group_id: group.id }).target }
 
     it 'returns an epic' do
       expect(subject).to eq(epic)
     end
 
     it 'fails if group id is missing' do
-      expect {  NotesFinder.new(user, { target_id: epic.id, target_type: 'epic' }).target }.to raise_error(ArgumentError)
+      expect {  described_class.new(user, { target_id: epic.id, target_type: 'epic' }).target }.to raise_error(ArgumentError)
     end
   end
 
   describe '#execute' do
     context 'when using target id and type of epics' do
-      subject { NotesFinder.new(user, { target_id: epic.id, target_type: 'epic', group_id: group.id }).execute }
+      subject { described_class.new(user, { target_id: epic.id, target_type: 'epic', group_id: group.id }).execute }
 
       it 'returns the expected notes' do
         expect(subject).to eq([note])
       end
 
       it 'fails if group id is missing' do
-        expect { NotesFinder.new(user, { target_id: epic.id, target_type: 'epic' }).execute }.to raise_error(ArgumentError)
+        expect { described_class.new(user, { target_id: epic.id, target_type: 'epic' }).execute }.to raise_error(ArgumentError)
       end
     end
 
     context 'when using an explicit epic target' do
-      subject { NotesFinder.new(user, { target: epic }).execute }
+      subject { described_class.new(user, { target: epic }).execute }
 
       it 'returns the expected notes' do
         expect(subject).to eq([note])