Support for encrypted passwords for default admin user and project users

In this release, the "securityRealms" will be supported.
As default, it adds the Jenkins "admin" user and a "project-user" to the templates.

The project user has read-only permissions but can trigger a build.

To update or generate new passwords, it is possible to use a new option (selectable at the dialogs or with the command option: ./k8s-jcasc.sh createJenkinsUserPassword).