Use latest travis containers.
Use latest travis containers.

jcvernaleo/bitcore,genecyber/bitcore,martindale/bitcore,jcvernaleo/bitcore,iobond/bitcore,bitpay/bitcore,initaldk/bitcore,iobond/bitcore,phplaboratory/bitcore,daxxog/clamcore,bitpay/bitcore,adjoinant/bitcore,adjoinant/bitcore,bilthon/bitcore,genecyber/bitcore,phplaboratory/bitcore,bitpay/bitcore,bitjson/bitcore,iobond/bitcore,GroestlCoin/groestlcore,bilthon/bitcore,litecoin-project/litecore,bitjson/bitcore,williamcotton/bitcore,martindale/bitcore,iobond/bitcore,olalonde/bitcore,martindale/bitcore,janko33bd/bitcore,olalonde/bitcore,TeamPiggyCoin/PiggyCore,TeamPiggyCoin/PiggyCore,bitjson/bitcore,janko33bd/bitcore,martindale/bitcore,williamcotton/bitcore,daxxog/clamcore,bitjson/bitcore,bitpay/bitcore,UdjinM6/bitcore-dash,litecoin-project/litecore,initaldk/bitcore,iobond/bitcore