'test-asciidoctor-upstream' CI job not working due to torquebox domain expiration

[abelsromero]

torquebox domain expired and causes upstream test to fail when installing the Asciidoctor upstream version locally.

Warning:  Could not validate integrity of download from https://rubygems-proxy.torquebox.org/releases/de/saumya/mojo/gem-maven-plugin/1.1.8/gem-maven-plugin-1.1.8.jar
org.eclipse.aether.transfer.ChecksumFailureException: Checksum validation failed, expected <!doctype but is 25650cb6d33c67ede12ee2fffa6afb12bc88c196
    at org.eclipse.aether.connector.basic.ChecksumValidator.validateExternalChecksums (ChecksumValidator.java:174)
    at org.eclipse.aether.connector.basic.ChecksumValidator.validate (ChecksumValidator.java:103)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$GetTaskRunner.runTask (BasicRepositoryConnector.java:460)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run (BasicRepositoryConnector.java:364)
    at org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run (RunnableErrorForwarder.java:75)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1136)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:635)
    at java.lang.Thread.run (Thread.java:833)
Warning:  Could not validate integrity of download from https://rubygems-proxy.torquebox.org/releases/org/codehaus/plexus/plexus-utils/1.1/plexus-utils-1.1.jar
org.eclipse.aether.transfer.ChecksumFailureException: Checksum validation failed, expected <!doctype but is 25650cb6d33c67ede12ee2fffa6afb12bc88c196
    at org.eclipse.aether.connector.basic.ChecksumValidator.validateExternalChecksums (ChecksumValidator.java:174)
    at org.eclipse.aether.connector.basic.ChecksumValidator.validate (ChecksumValidator.java:103)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$GetTaskRunner.runTask (BasicRepositoryConnector.java:460)
    at org.eclipse.aether.connector.basic.BasicRepositoryConnector$TaskRunner.run (BasicRepositoryConnector.java:364)
    at org.eclipse.aether.util.concurrency.RunnableErrorForwarder$1.run (RunnableErrorForwarder.java:75)
    at java.util.concurrent.ThreadPoolExecutor.runWorker (ThreadPoolExecutor.java:1136)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:635)
    at java.lang.Thread.run (Thread.java:833)