Fixes #35169 - Call Pulp RefreshIfNeeded concurrently (#10188)

During manifest refresh, call pulp refresh repos concurrently
to leverage pulp tasking system to execute the independent pulp tasks.

Limit the level of concurrency by batches likewise Capsule sync, due to
similar scalability reasons.

Signed-off-by: Pavel Moravec <pmoravec@redhat.com>

app/lib/actions/katello/organization/manifest_refresh.rb

@@ -42,10 +42,14 @@ def plan(organization)
 
         def plan_refresh_repos(import_products_action, org)
           repositories = ::Katello::Repository.in_default_view.in_product(::Katello::Product.redhat.in_org(org))
-          repositories.each do |repo|
-            plan_action(Katello::Repository::RefreshRepository,
-              repo,
-              :dependency => import_products_action.output)
+          repositories.in_groups_of(Setting[:foreman_proxy_content_batch_size], false) do |repo_batch|
+            concurrence do
+              repo_batch.each do |repo|
+                plan_action(Katello::Repository::RefreshRepository,
+                  repo,
+                  :dependency => import_products_action.output)
+              end
+            end
           end
         end