Actually use the read_timeout config option

lib/gitlab_net.rb

@@ -73,7 +73,7 @@ class GitlabNet
       http = Net::HTTP.new(uri.host, uri.port)
     end
 
-    http.read_timeout = options[:read_timeout] || READ_TIMEOUT
+    http.read_timeout = options[:read_timeout] || read_timeout
 
     if uri.is_a?(URI::HTTPS)
       http.use_ssl = true
@@ -154,4 +154,8 @@ class GitlabNet
   def secret_token
     @secret_token ||= File.read config.secret_file
   end
+
+  def read_timeout
+    config.http_settings['read_timeout'] || READ_TIMEOUT
+  end
 end

spec/gitlab_net_spec.rb

@@ -143,7 +143,7 @@ describe GitlabNet, vcr: true do
     subject { gitlab_net.send :http_client_for, URI('https://localhost/') }
     before do
       gitlab_net.stub! :cert_store
-      gitlab_net.send(:config).http_settings.stub(:[]).with('self_signed_cert') { true }
+      gitlab_net.send(:config).stub(:http_settings) { {'self_signed_cert' => true} }
     end
 
     its(:verify_mode) { should eq(OpenSSL::SSL::VERIFY_NONE) }