HCatalog failing frequently on fetch of org.pentaho:pentaho-aggdesigner-algorithm:5.1.5-jhyde

The download seems to fail. There are three aspects to this:

• The Gradle build should have a local persistent cache so it isn't fetching. But as I understand it Gradle has a policy of still pinging the repo even when cached.
• The Gradle build is probably re-fetching due to --rerun-tasks so we need to stop doing that.
• The artifact is not in "Central" repository but in "Spring Plugins". That is probably why all the failures are on this artifact and no other artifacts cause failures.