updated JS to only go 1 level deep when expanding/collapsing accordion
updated JS to only go 1 level deep when expanding/collapsing accordion

CDLUC3/dmptool,DigitalCurationCentre/roadmap,CDLUC3/roadmap,DMPRoadmap/roadmap,CDLUC3/dmptool,CDLUC3/roadmap,DigitalCurationCentre/roadmap,DMPRoadmap/roadmap,CDLUC3/roadmap,CDLUC3/dmptool,DigitalCurationCentre/roadmap,CDLUC3/dmptool,DMPRoadmap/roadmap,CDLUC3/roadmap