Changes

For the generation of an izpack distribution of Silverpeas, remove the computation of the next version
Fix syntax in the Jenkinsfile to generate a docker image for jobs in
Jenkins and for dev.
Fix bug syntax in the Jenkinsfile to generate a Docker image of
Silverpeas and to open a PR in the DockerHub github to integrate this
image in the Docker official repositories.

Update the mapping between Silverpeas branches and Docker image version to build it

During the generation of the web site of the Silverpeas community, when
getting the Wildfly version from the release report of a stable version
of Silverpeas, remove the '.Final' word from it.

Update the URL of the Maven repositories so that it refers the
'silverpeas' repo and not only the 'build' one.

The build version of silverpeas mobile doesn't follow anymore the one of
Silverpeas. Silverpeas mobile has now its own build version lifecycle.

With the replacement of Jackrabbit 2 by Jackrabbit Oak, there is no more requirement on jcrAccessControl.

With the replacement of Jackrabbit 2 by Jackrabbit Oak as implementation
of the JCR used by Silverpeas, the branch 'master' has been duplicated
in order to keep track of the two versions of Silverpeas 6.4 in dev: one
with Jackrabbit Oak (master) and the another one with Jackrabbit 2
(master-jackrabbit). These two branches will be kept until the release
of version 6.4. So, the pipelines dedicated in the construction of build
versions as well as to release a version of Silverpeas have been updated
in consequence.

Improve the pipeline to construct a build version of Silverpeas Mobile.

For 6.4 with Jackrabbit 2, the docker image to use is now 6.4-JR instead
of latest. Latest will be for 6.4 with Jackrabbit Oak (the default 6.4)

Fix a bug in the release pipeline of Silverpeas