Disable RequestContext deadline checking in tests

This deadline made it difficult to debug feature specs because any
Gitaly calls that were issued would fail after 57 seconds. We disable
this timeout during tests to make it easier to use a debugger.

Closes https://gitlab.com/gitlab-org/gitlab-development-kit/issues/882

lib/gitlab/request_context.rb

@@ -24,6 +24,7 @@ module Gitlab
     end
 
     def ensure_deadline_not_exceeded!
+      return unless enabled?
       return unless request_deadline
       return if Gitlab::Metrics::System.real_time < request_deadline
 
@@ -36,5 +37,9 @@ module Gitlab
     def max_request_duration_seconds
       Settings.gitlab.max_request_duration_seconds
     end
+
+    def enabled?
+      !Rails.env.test?
+    end
   end
 end

spec/lib/gitlab/request_context_spec.rb

@@ -5,6 +5,10 @@ require 'spec_helper'
 describe Gitlab::RequestContext, :request_store do
   subject { described_class.instance }
 
+  before do
+    allow(subject).to receive(:enabled?).and_return(true)
+  end
+
   it { is_expected.to have_attributes(client_ip: nil, start_thread_cpu_time: nil, request_start_time: nil) }
 
   describe '#request_deadline' do