housekeeping: upgrade to groovy 2.2.1 in preparation to fully go for a java 8 - friendly API
housekeeping: upgrade to groovy 2.2.1 in preparation to fully go for a java 8 - friendly API

canoo/open-dolphin,janih/open-dolphin,DaveKriewall/open-dolphin,canoo/open-dolphin,canoo/open-dolphin,janih/open-dolphin,nagyistoce/open-dolphin,janih/open-dolphin,janih/open-dolphin,Poundex/open-dolphin,gemaSantiago/open-dolphin,DaveKriewall/open-dolphin,gemaSantiago/open-dolphin,DaveKriewall/open-dolphin,Poundex/open-dolphin,Poundex/open-dolphin,gemaSantiago/open-dolphin,Poundex/open-dolphin,gemaSantiago/open-dolphin,DaveKriewall/open-dolphin,nagyistoce/open-dolphin,nagyistoce/open-dolphin,nagyistoce/open-dolphin,canoo/open-dolphin