Fix flaky specs due to rate limiter change

We need to freeze time in these specs so that we know the multiple
requests we're making fall into the same time bucket used by the rate
limiter

ee/spec/controllers/groups/epics_controller_spec.rb

@@ -493,12 +493,12 @@ RSpec.describe Groups::EpicsController do
           end
         end
 
-        context 'when the endpoint receives requests above the limit' do
+        context 'when the endpoint receives requests above the limit', :freeze_time, :clean_gitlab_redis_rate_limiting do
           before do
             stub_application_setting(issues_create_limit: 5)
           end
 
-          it 'prevents from creating more epics', :request_store do
+          it 'prevents from creating more epics' do
             5.times { post :create, params: { group_id: group, epic: { title: 'new epic', description: 'description' } } }
 
             post :create, params: { group_id: group, epic: { title: 'new epic', description: 'description' } }

spec/controllers/projects/issues_controller_spec.rb

@@ -1408,7 +1408,7 @@ RSpec.describe Projects::IssuesController do
       end
     end
 
-    context 'when the endpoint receives requests above the limit' do
+    context 'when the endpoint receives requests above the limit', :freeze_time, :clean_gitlab_redis_rate_limiting do
       before do
         stub_application_setting(issues_create_limit: 5)
       end

spec/lib/gitlab/email/handler/service_desk_handler_spec.rb

@@ -259,7 +259,7 @@ RSpec.describe Gitlab::Email::Handler::ServiceDeskHandler do
       end
     end
 
-    context 'when rate limiting is in effect', :clean_gitlab_redis_cache do
+    context 'when rate limiting is in effect', :freeze_time, :clean_gitlab_redis_rate_limiting do
       let(:receiver) { Gitlab::Email::Receiver.new(email_raw) }
 
       subject { 2.times { receiver.execute } }
@@ -271,19 +271,15 @@ RSpec.describe Gitlab::Email::Handler::ServiceDeskHandler do
 
       context 'when too many requests are sent by one user' do
         it 'raises an error' do
-          freeze_time do
           expect { subject }.to raise_error(RateLimitedService::RateLimitedError)
         end
-        end
 
         it 'creates 1 issue' do
-          freeze_time do
           expect do
             subject
           rescue RateLimitedService::RateLimitedError
           end.to change { Issue.count }.by(1)
         end
-        end
 
         context 'when requests are sent by different users' do
           let(:email_raw_2) { email_fixture('emails/service_desk_forwarded.eml') }
@@ -295,12 +291,10 @@ RSpec.describe Gitlab::Email::Handler::ServiceDeskHandler do
           end
 
           it 'creates 2 issues' do
-            freeze_time do
             expect { subject }.to change { Issue.count }.by(2)
           end
         end
       end
-      end
 
       context 'when limit is higher than sent emails' do
         before do
@@ -308,12 +302,10 @@ RSpec.describe Gitlab::Email::Handler::ServiceDeskHandler do
         end
 
         it 'creates 2 issues' do
-          freeze_time do
           expect { subject }.to change { Issue.count }.by(2)
         end
       end
     end
-    end
 
     describe '#can_handle?' do
       let(:mail) { Mail::Message.new(email_raw) }

spec/services/issues/create_service_spec.rb

@@ -302,7 +302,7 @@ RSpec.describe Issues::CreateService do
         described_class.new(project: project, current_user: user, params: opts, spam_params: spam_params).execute
       end
 
-      context 'when rate limiting is in effect', :clean_gitlab_redis_cache do
+      context 'when rate limiting is in effect', :freeze_time, :clean_gitlab_redis_rate_limiting do
         let(:user) { create(:user) }
 
         before do
@@ -316,22 +316,18 @@ RSpec.describe Issues::CreateService do
 
         context 'when too many requests are sent by one user' do
           it 'raises an error' do
-            freeze_time do
             expect do
               subject
             end.to raise_error(RateLimitedService::RateLimitedError)
           end
-          end
 
           it 'creates 1 issue' do
-            freeze_time do
             expect do
               subject
             rescue RateLimitedService::RateLimitedError
             end.to change { Issue.count }.by(1)
           end
         end
-        end
 
         context 'when limit is higher than counf of issues being created' do
           before do
@@ -339,12 +335,10 @@ RSpec.describe Issues::CreateService do
           end
 
           it 'creates 2 issues' do
-            freeze_time do
             expect { subject }.to change { Issue.count }.by(2)
           end
         end
       end
-      end
 
       context 'after_save callback to store_mentions' do
         context 'when mentionable attributes change' do