travis: remove oracle-java8-installer as it broke and use the oraclejdk travis ships, which is new enough now
travis: remove oracle-java8-installer as it broke and use the oraclejdk travis ships, which is new enough now

l2-/runelite,l2-/runelite,Sethtroll/runelite,devinfrench/runelite,KronosDesign/runelite,Noremac201/runelite,Noremac201/runelite,abelbriggs1/runelite,abelbriggs1/runelite,runelite/runelite,abelbriggs1/runelite,runelite/runelite,KronosDesign/runelite,Sethtroll/runelite,runelite/runelite,devinfrench/runelite