As the requirement for persistent keyword index values is gone,
let's rearrange the keywords to a more logical and also gapless
order, which allows to get rid of the cumbersome multiple loops in
ImpSvNumberformatScan::GetKeyWord().

Change-Id: Ic1a034acc5f42f593b147a1baf377f1600fac118
Reviewed-on: https://gerrit.libreoffice.org/60692Reviewed-by: Eike Rathke <erack@redhat.com>
Tested-by: Eike Rathke <erack@redhat.com>