Refactor how WICKED_PDF_PATH is set in travis
Refactor how WICKED_PDF_PATH is set in travis

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