Issue 49731 - Fix additional issues with setting db home directory by default
    
    Description:  The db home dir does need to be set in the template-dse.ldif file,
                  but this required additional changes to perl modules that setup-ds.pl
                  uses.  There are also issues with containers where /dev/shm could
                  be undersized for the database, so for container installs we will
                  not set the db-home-dir to tmpfs.
    
    relates: https://pagure.io/389-ds-base/issue/49731
    
    Reviewed by: ?