RSpec zero monkey patching mode

The plan for RSpec 4.0 is to disable monkey patching:
https://rspec.info/blog/2013/07/the-plan-for-rspec-3/#zero-monkey-patching-mode

This commit stops using RSpec monkey patching:
https://relishapp.com/rspec/rspec-core/docs/configuration/zero-monkey-patching-mode

ee/spec/models/push_rule_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe PushRule do
+RSpec.describe PushRule do
   using RSpec::Parameterized::TableSyntax
   let(:global_push_rule) { create(:push_rule_sample) }

ee/spec/models/remote_mirror_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe RemoteMirror do
+RSpec.describe RemoteMirror do
   let(:project) { create(:project, :repository, :remote_mirror) }
   describe '#sync' do

ee/spec/models/repository_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe Repository do
+RSpec.describe Repository do
   include RepoHelpers
   include ::EE::GeoHelpers
   include GitHelpers

ee/spec/models/requirements_management/requirement_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe RequirementsManagement::Requirement do
+RSpec.describe RequirementsManagement::Requirement do
   let_it_be(:user) { create(:user) }
   let_it_be(:project) { create(:project) }

ee/spec/models/requirements_management/test_report_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe RequirementsManagement::TestReport do
+RSpec.describe RequirementsManagement::TestReport do
   describe 'associations' do
     subject { build(:test_report) }

ee/spec/models/saml_provider_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe SamlProvider do
+RSpec.describe SamlProvider do
   let(:group) { create(:group) }
   subject(:saml_provider) { create(:saml_provider, group: group) }

ee/spec/models/scim_identity_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe ScimIdentity do
+RSpec.describe ScimIdentity do
   describe 'relations' do
     it { is_expected.to belong_to(:group) }
     it { is_expected.to belong_to(:user) }

ee/spec/models/scim_oauth_access_token_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe ScimOauthAccessToken do
+RSpec.describe ScimOauthAccessToken do
   describe "Associations" do
     it { is_expected.to belong_to :group }
   end

ee/spec/models/scoped_label_set_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe ScopedLabelSet do
+RSpec.describe ScopedLabelSet do
   let_it_be(:kv_label1) { create(:label, title: 'key::label1') }
   let_it_be(:kv_label2) { create(:label, title: 'key::label2') }
   let_it_be(:kv_label3) { create(:label, title: 'key::label3') }

ee/spec/models/security/scan_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe Security::Scan do
+RSpec.describe Security::Scan do
   describe 'associations' do
     it { is_expected.to belong_to(:build) }
     it { is_expected.to have_one(:pipeline).through(:build).class_name('Ci::Pipeline') }

ee/spec/models/service_desk_setting_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe ServiceDeskSetting do
+RSpec.describe ServiceDeskSetting do
   describe 'validations' do
     subject(:service_desk_setting) { create(:service_desk_setting) }

ee/spec/models/service_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe Service do
+RSpec.describe Service do
   describe 'Available services' do
     let(:ee_services) do
       %w(

ee/spec/models/slack_integration_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe SlackIntegration do
+RSpec.describe SlackIntegration do
   describe "Associations" do
     it { is_expected.to belong_to(:service) }
   end

ee/spec/models/software_license_policy_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe SoftwareLicensePolicy do
+RSpec.describe SoftwareLicensePolicy do
   subject { build(:software_license_policy) }
   describe 'validations' do

ee/spec/models/software_license_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe SoftwareLicense do
+RSpec.describe SoftwareLicense do
   subject { build(:software_license) }
   describe 'validations' do

ee/spec/models/status_page/project_setting_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe StatusPage::ProjectSetting do
+RSpec.describe StatusPage::ProjectSetting do
   describe 'associations' do
     it { is_expected.to belong_to(:project) }
   end

ee/spec/models/status_page/published_incident_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe StatusPage::PublishedIncident do
+RSpec.describe StatusPage::PublishedIncident do
   describe 'associations' do
     it { is_expected.to belong_to(:issue).inverse_of(:status_page_published_incident) }
   end

ee/spec/models/storage_shard_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe StorageShard do
+RSpec.describe StorageShard do
   describe '.all' do
     it 'returns an array of StorageShard objects' do
       shards = described_class.all

ee/spec/models/upload_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe Upload do
+RSpec.describe Upload do
   include EE::GeoHelpers
   describe '#destroy' do

ee/spec/models/user_preference_spec.rb

@@ -2,7 +2,7 @@
 require 'spec_helper'
-describe UserPreference do
+RSpec.describe UserPreference do
   let(:user_preference) { create(:user_preference) }
   shared_examples 'updates roadmap_epics_state' do |state|