Acceptance tests are broken

[TheMeier]

Service does not start because of:

  May 05 15:59:19 centos8-64-1 systemd-entrypoint[5383]: java.lang.IllegalStateException: failed to load plugin class [org.opensearch.security.OpenSearchSecurityPlugin]
  May 05 15:59:19 centos8-64-1 systemd-entrypoint[5383]: Likely root cause: OpenSearchException[Unable to read /etc/opensearch/esnode.pem (/etc/opensearch/esnode.pem). Please make sure this files exists and is readable regarding to permissions. Property: plugins.security.ssl.transport.pemcert_filepath]

[smortex]

Root cause is the breakage due to changes related to the admin password and introduced in 2.12.0.

See opensearch-project/security#4344 for more details about the issue and a proposal for fixing this.