Deprecate java docker image

[Samuel Addico]

Pipeline breaks because frolvlad/alpine-oraclejdk8:slim is deprecated .

I had to switch to frolvlad/alpine-oraclejre8:slim to get it to work.

[John McEntire]

Encountered same problem... changed all Dockerfile(s) as in ...
#FROM frolvlad/alpine-oraclejdk8:slim
FROM frolvlad/alpine-java

solution from samaddico may be better for 'slim' edition