ITS #9417 ldapexop exit with correct rc value

`rc` collects exit status all the way down but is not used at all? If `code`
comparison at exit is intended then there exists some path that leaves it in
garbage value, say when `ldap_whoami` or `ldap_cancel` fails.

clients/tools/ldapexop.c

@@ -351,5 +351,5 @@ skip:
 	/* disconnect from server */
 	if ( res )
 		ldap_msgfree( res );
-	tool_exit( ld, code == LDAP_SUCCESS ? EXIT_SUCCESS : EXIT_FAILURE );
+	tool_exit( ld, rc );
 }