HPCC-12059 Need tool to create initial LDAP OUs and admin HPCC user

Instead of requiring the LDAP System User and password to be specified in
the HPCC configuration file, there should be a separate tool used to create
the initial HPCC OUs and an admin user that can be specified in the LDAPServer
SystemUser fields. This change request creates a new ldapinit tool that does
just that

Signed-off-by: William Whitehead <william.whitehead@lexisnexis.com>