Avoid error when indexing analysis with no service
Avoid error when indexing analysis with no service

(It should be an error that analyses are ever indexed before the service is configured,
but it does sometimes happen when analyses are created in non-standard ways)

veroc/Bika-LIMS,labsanmartin/Bika-LIMS,rockfruit/bika.lims,veroc/Bika-LIMS,labsanmartin/Bika-LIMS,rockfruit/bika.lims,veroc/Bika-LIMS,labsanmartin/Bika-LIMS