Elastic Cloud Enterprise 2.7.2

The following bug fixes are included in this release.

Fixed container scheduled service connections leak. We added a new container scheduled task service in release 2.7.0 for running miscellaneous administrative tasks on runners with the allocator role. Unfortunately, this new service was causing an excessive number of connections to be created to the ZooKeeper coordination services. This release addresses the resource leak.

Reindex 5.x indices when upgrading system clusters to 7.x. The ECE 2.7 upgrader contained a bug where automatically upgrading the Admin cluster to Elasticsearch 7.x could fail due to some indices that were created in Elasticsearch 5.x not being properly migrated to 7.x format. The upgrade process is now fixed for 5.x indices.