move to openjdk-8-jdk from oracle jdk

[mstoops]

I and others have recently experienced issues with the oracle jdk on bare metal, and before moving over to your docker setup, I was able to easily make this switch, based on these recommendations:

https://www.reddit.com/r/Ubiquiti/comments/au52p8/a_few_lessons_i_learned_creating_a_raspberry_pi/?st=JSK22ZE2&sh=241980c2

Does this make sense to do?

The second recommendation in that article is to installed the haveged package to help speed things up. Another addition, maybe?

[ryansch]

@mstoops It seems like the issues with the oracle jdk are related to the version pulled in with the package manager. You'll notice I worked around that with oracle-java8-installer. Have you had any issues with the version of java I have in the container image?

What problem are you trying to solve with haveged? Have you noticed a lack of entropy causing issues? We're not issuing certificates or anything else that I'm aware of that would consume more entropy than the kernel is able to supply.