Ticket #47299 - allow cmdline scripts to work with non-root user
    
    https://fedorahosted.org/389/ticket/47299
    Reviewed by: nhosoi (Thanks!)
    Branch: 389-ds-base-1.3.1
    Fix Description: Handle the case where the directory server userid is a real
    user on the system, and allow that user to run the command line scripts against
    that server without using sudo.  I also centralized the handling of the
    initconfig (/etc/sysconfig/dirsrv-*) files in DSSharedLib and DSUtil.pm.
    I changed the way the scripts work - the sh scripts need the "normalized"
    server id and the CONFIG_DIR (/etc/dirsrv/slapd-$servid) - we first find the
    initconfig file for the given instance, then we just source it - CONFIG_DIR
    is one of the settings in the file - no need to parse in sh because source
    does that.
    In perl, do the same thing, except have to parse the initconfig file to get
    the CONFIG_DIR.
    Platforms tested: RHEL6 x86_64
    Flag Day: no
    Doc impact: no
    (cherry picked from commit 6fb5b261d8a97a761b52e57bf8ccdc203c74ea8c)