Change `foo.should_not` syntax to `expect(foo).not_to` in specs

spec/lib/gitlab/ldap/access_spec.rb

@@ -56,7 +56,7 @@ describe Gitlab::LDAP::Access do
           it "should unblock user in GitLab" do
             access.allowed?
-            user.should_not be_blocked
+            expect(user).not_to be_blocked
           end
         end
       end

spec/models/project_services/irker_service_spec.rb

@@ -43,7 +43,7 @@ describe IrkerService do
       let(:_recipients) { 'a b c d' }
       it 'should add an error if there is too many recipients' do
         subject.send :check_recipients_count
-        subject.errors.should_not be_blank
+        expect(subject.errors).not_to be_blank
       end
     end

spec/services/destroy_group_service_spec.rb

@@ -12,8 +12,8 @@ describe DestroyGroupService do
       destroy_group(group, user)
     end
-    it { Group.all.should_not include(group) }
-    it { Project.all.should_not include(project) }
+    it { expect(Group.all).not_to include(group) }
+    it { expect(Project.all).not_to include(project) }
   end
   context 'file system' do

spec/services/projects/destroy_service_spec.rb

@@ -12,7 +12,7 @@ describe Projects::DestroyService do
       Sidekiq::Testing.inline! { destroy_project(project, user, {}) }
     end
-    it { Project.all.should_not include(project) }
+    it { expect(Project.all).not_to include(project) }
     it { Dir.exists?(path).should be_falsey }
     it { Dir.exists?(remove_path).should be_falsey }
   end
@@ -23,7 +23,7 @@ describe Projects::DestroyService do
       Sidekiq::Testing.fake! { destroy_project(project, user, {}) }
     end
-    it { Project.all.should_not include(project) }
+    it { expect(Project.all).not_to include(project) }
     it { Dir.exists?(path).should be_falsey }
     it { Dir.exists?(remove_path).should be_truthy }
   end