Create a dockerfile for OpenJDK 10 builds and update v8 & v9 dockerfiles

[SueChaplain]

/buildenv/docker/* dockerfiles for Java 8 & 9 pull OpenJDK builds from Ubuntu as the bootjdk images. These should be replaced with Adopt builds.

We also need a dockerfile for Java 10 which we can link to from the OpenJ9 website build page:
https://www.eclipse.org/openj9/oj9_build.html

[DanHeidinga]

@babsingh Can you create the JDK 10 docker file?

The Extensions repo is at https://github.com/ibmruntimes/openj9-openjdk-jdk10 and should have content soon.

[DanHeidinga]

For the bootjdk, we should try to use an AdoptOpenJDK JDK9 build. Adopt has an API that can be used to download specific binaries https://api.adoptopenjdk.net/README

Let's get the 10 dockerfile asap and then look at updating the 8/9 ones

[babsingh]

Started dockerfile work for OpenJDK 10 builds here: #1514

[babsingh]

Started work to update JDK9 (buildenv/docker/jdk9/*) Dockerfile(s) here: #1541

[babsingh]

For JDK 8 DockerFiles, we won't be able to use Adopt builds for the boot jdk since AdoptOpenJDK doesn't support OpenJDK7 builds.

An exception was made for JDK8 s390x DockerFile to use AdoptOpenJDK OpenJ9 OpenJDK8 build as the boot jdk: #1526.

Started work to update JDK8 s390x DockerFile here: #1545.

[babsingh]

@SueChaplain @DanHeidinga All changes have been delivered. This issue can be closed.

Update:

1. OpenJDK 10 DockerFile(s) have been added (Add docker files for OpenJDK 10 #1514; merged).
2. OpenJDK 9 DockerFiles(s) have been updated to use AdoptOpenJDK OpenJ9 JDK8 builds as the boot JDK (Update buildenv/docker/jdk9/* Dockerfile(s) #1541; merged).
3. Only OpenJDK 8 s390 was updated to use AdoptOpenJDK OpenJ9 JDK8 build due to a performance issue (Update s390 docker image for JDK8 to use Adopt-OpenJ9 #1545; merged). Other OpenJDK 8 DockerFile(s) need to follow the convention of using (N -1) JDK7 builds as the boot JDK. AdoptOpenJDK doesn't support JDK7 builds so we can't use AdoptOpenJDK builds for the remaining OpenJDK 8 DockerFile(s).

[DanHeidinga]

Thanks @babsingh

We also need a dockerfile for Java 10 which we can link to from the OpenJ9 website build page:
https://www.eclipse.org/openj9/oj9_build.html

Have you opened a PR for the update to the website as well?

[babsingh]

Created a pull request for updating oj9_build.html - eclipse-openj9/openj9-website#73
Created a pull request for adding Build_Instructions_V10.md and its dependencies: #1665

[babsingh]

@DanHeidinga all changes are compete for this issue. the eclipse openj9 build page has been updated to show Java 10 instructions: https://www.eclipse.org/openj9/oj9_build.html. so, this issue can be closed.