Upgrading the Authorization UG plugin fails build in CI

[alwin-joseph]

The Authorization users guide plugins in user_guides/jacc/pom.xml should be able to be upgraded as it was done in #406. This works in local builds but fails in CI with below:

[exec] [INFO] BUILD FAILURE
[exec] [INFO] ------------------------------------------------------------------------
[exec] [INFO] Total time: 19.409 s
[exec] [INFO] Finished at: 2020-08-08T12:23:45Z
[exec] [INFO] ------------------------------------------------------------------------
[exec] [ERROR] Failed to execute goal org.asciidoctor:asciidoctor-maven-plugin:2.0.0-RC.1:process-asciidoc (generate-pdf-doc) on project tck_jacc: Execution generate-pdf-doc of goal org.asciidoctor:asciidoctor-maven-plugin:2.0.0-RC.1:process-asciidoc failed: (ENOENT) No such file or directory - file:/home/jenkins/agent/workspace/aee-tck-alwin_platformmoderename/user_guides/jacc/open-uri-cached-0.0.5.gemspec -> [Help 1]
[exec] [ERROR]

Hence the same is reverted in #453 for now until we are able to resolve this issue.