Merge branch 'GONRG-7028-Update-base-images-for-java-services' into 'master'

base image changed

See merge request !487

provider/schema-gc/cloudbuild/Dockerfile.cloudbuild

-# Use the official AdoptOpenJDK for a base image.
-# https://hub.docker.com/_/openjdk
-FROM openjdk:8-slim
+FROM azul/zulu-openjdk-alpine:8-latest
 WORKDIR /app
 ARG PROVIDER_NAME
 ENV PROVIDER_NAME $PROVIDER_NAME