speedup travis by caching gradle artefacts and using containerized infrastructure
speedup travis by caching gradle artefacts and using containerized infrastructure

Rubbiroid/JGiven,Rubbiroid/JGiven,ahus1/JGiven,TNG/JGiven,ahus1/JGiven,albertofaci/JGiven,TNG/JGiven,albertofaci/JGiven,Rubbiroid/JGiven,albertofaci/JGiven,TNG/JGiven,ahus1/JGiven,Rubbiroid/JGiven,albertofaci/JGiven,TNG/JGiven,ahus1/JGiven