[I] Parameterize kogito-ci-build image's JDKs and MVN versions [incubator-kie-issues]

["jstastny-cz (via GitHub)" <gi...@apache.org>]

jstastny-cz opened a new issue, #773:
URL: https://github.com/apache/incubator-kie-issues/issues/773

   The kogito-ci-build container uses SDKMan to manage versions of JDK and Maven.
   
   It offers a unified way to install multiple versions and easily switch between them.
   
   For cases when a job needs different version of JDK, we should introduce a way to switch between preinstalled versions.
   
   The switching could be implemented using env variables passed to docker run command, `docker run ... -e JDK_VERSION=8.0.392-tem` and that would require adjusting entrypoint.sh script to consume this value and call respective SDKMAN command.
   
   Pipelines then could in their agent configuration define the requested JDK or MVN version override.
   ```
   pipeline {
     agent {
       docker {
          image:
          args: '<default> -e JDK_VERSION=8.0.392-tem'
   ```
   
   This might still not be enough for all cases, especially when PR check jobs would be pre-generated - then the versions used need to be tweaked dynamically. This could be done by implementing a jenkins pipeline shared library methods to switch JDK and MVN versions on the fly by directly invoking sdk binary from a shell step.


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