Changes

Update the build of the Docker image for a build environment for
Silverpeas projects. First, a new build argument is passed: the version
of Java to use for running a Sonar analysis. Second, in order to build
a fix version of an existing Docker image stable version, we reorder the
pipeline stages so that the release of a stable version is done after
its build.

Update the pipeline for building a build version of Silverpeas: Sonar is
now executed by using at least Java 17. This version of Java is provided
by the Docker image through the env var SONAR_JDK_HOME.

Fix Dockerfile label