HPCC-8430 Document addScopes utility in LDAP section

Signed-off-by: JamesDeFabia <James.Defabia@LexisNexis.com>
Merge pull request #5474 from JamesDeFabia/8430_DocumentAddscopesTool

HPCC-8430 Document addScopes utility in LDAP section

Reviewed-By: Russ Whitehead <william.whitehead@lexisnexis.com>
Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>