Issue 49731 - undo db_home_dir under /dev/shm/dirsrv for now
    
    Bug Description:  There are several issues with using /dec/shm/disrv/
                      for the db home directory.  Cantainers have issues,
                      and system reboots can cause issues too.
    
    Fix Description:  Using just /dev/shm/slapd-INST solves all the permission
                      issues, but that requires a new selinux label, so
                      for now we will just set the db home directory to the
                      database directory (effectively disabling the change).
    
    relates: https://pagure.io/389-ds-base/issue/49731
    
    Reviewed by: firstyear & tbordaz(Thanks!)