Merge branch 'bw-jira-list-performance' into 'master'

Only query for necessary Jira fields

See merge request gitlab-org/gitlab!36655

app/services/jira/requests/issues/list_service.rb

@@ -7,6 +7,9 @@ module Jira
         extend ::Gitlab::Utils::Override
 
         PER_PAGE = 100
+        DEFAULT_FIELDS = %w[assignee created creator id issuetype key
+                            labels priority project reporter resolutiondate
+                            status statuscategorychangeddate summary updated].join(',').freeze
 
         def initialize(jira_service, params = {})
           super(jira_service, params)
@@ -22,7 +25,7 @@ module Jira
 
         override :url
         def url
-          "#{base_api_url}/search?jql=#{CGI.escape(jql)}&startAt=#{start_at}&maxResults=#{per_page}&fields=*all"
+          "#{base_api_url}/search?jql=#{CGI.escape(jql)}&startAt=#{start_at}&maxResults=#{per_page}&fields=#{DEFAULT_FIELDS}"
         end
 
         override :build_service_response

spec/services/jira/requests/issues/list_service_spec.rb

@@ -103,6 +103,12 @@ RSpec.describe Jira::Requests::Issues::ListService do
             subject
           end
         end
+
+        it 'requests for default fields' do
+          expect(client).to receive(:get).with(include("fields=#{described_class::DEFAULT_FIELDS}")).and_return([])
+
+          subject
+        end
       end
     end
   end