resolved fdo#65082 RATE function should not find roots <= -1
resolved fdo#65082 RATE function should not find roots <= -1

Limit RATE to roots > -1.0, which is what also Excel and now Gnumeric
do. If the Newton goal seek fails for the default guess value 0.1 try
other values.

This now also calculates the few remaining error cases of i#15090
attachment https://issues.apache.org/ooo/attachment.cgi?id=6528
correctly.

Change-Id: Ic62cc807626b4715035c3076f58f303b9020db5a

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core