Check compatibility with Java 17 and Java 21

[coudot]

No description provided.

[rouazana]

Compilation (with test) does not work with Java 17 and Java 21 does not work because of a certificate issue caused by OpenDS.

Caused by: org.opends.server.types.InitializationException: The administration connector self-signed certificate cannot be generated because the following error occurred: The following error occured when generating a self-signed certificate using the alias admin-cert: class org.opends.server.util.Platform$PlatformIMPL cannot access class sun.security.tools.keytool.CertAndKeyGen (in module java.base) because module java.base does not export sun.security.tools.keytool to unnamed module @1cc50131

I will try to find a workaround but the best move would be to remove OpenDS and to replace it by an OpenLDAP server in a docker container (with the help of test containers).

[rouazana]

I fixed the launch of OpenDJ: 2d47fa3

There are still some failing tests, but it seems it's now related to #133.

I also created an issue to completely remove OpenDJ: #239

[vikinghawk]

any idea when 2.2 with java 17 support will be released?