Tycho CI Builds - 502 Bad Gateway / 503 Service Unavailable

The m2eclipse build currently fails with:

[INFO] --- maven-dependency-plugin:3.2.0:copy-dependencies (fetch-dependencies) @ m2e-maven-runtime --- [WARNING] Could not validate integrity of download from https://repo.eclipse.org/content/repositories/maven_central/org/apache/xbean/xbean/3.7/xbean-3.7.pom

Could not transfer artifact org.apache.maven:maven-aether-provider:pom:3.1.1 from/to cbi-releases (https://repo.eclipse.org/content/repositories/cbi-releases/): transfer failed for https://repo.eclipse.org/content/repositories/cbi-releases/org/apache/maven/maven-aether-provider/3.1.1/maven-aether-provider-3.1.1.pom, status: 502 Bad Gateway -> [Help 1]

https://ci.eclipse.org/m2e/job/m2e/job/PR-754/4/console

FYI @mistria @akurtakov