[travis] do not install java explicitly
[travis] do not install java explicitly

icedwater/jpype,originell/jpype,originell/jpype,Cosmius/jpype,originell/jpype,originell/jpype,ktan2020/jpype,originell/jpype,rrader/jpype,icedwater/jpype,icedwater/jpype,ktan2020/jpype,Cosmius/jpype,icedwater/jpype,ktan2020/jpype,rrader/jpype,rrader/jpype,ktan2020/jpype,Cosmius/jpype,Cosmius/jpype,rrader/jpype