Allow to use Eclipse OpenJ9 JVM to run che-server

[benoitf]

What does this PR do?

Eclipse Che can be run on Java9 runtime. So adding Dockerfile for Eclipse JVM OpenJ9

What issues does this PR fix or reference?

#5326

Release Notes

N/A

Docs PR

N/A

Change-Id: I309e6eb1af4d0166758481bfd462c074de384ad6
Signed-off-by: Florent BENOIT [email protected]

[skabashnyuk]

How Dockerfile.openj9 will be used?

[benoitf]

ppl can use it (like centos one)

[skabashnyuk]

Imagine I'm that man who wants to use it.
Are you sure this is a right way?

+# To run it:
 +#  docker run --net=host \
 +#             --name che \
 +#             -v /var/run/docker.sock:/var/run/docker.sock \
 +#             -v /home/user/che/lib:/home/user/che/lib-copy \
 +#             -v /home/user/che/workspaces:/home/user/che/workspaces \
 +#             -v /home/user/che/storage:/home/user/che/storage \
 +#             codenvy/che-server

Onother question. Licensing.
@riuvshin afaik we adding some notes about licenses for OpenJDK. WDYT do we need to do the same here?

[benoitf]

@skabashnyuk the run instruction is a duplicate of Dockerfile (I've updated to remove codenvy from image name)

about licensing AFAIK OpenJ9 is EPL 2.0 and Apache 2.0 licensed

[benoitf]

@skabashnyuk also with CLI you can override name of the images, so you could use -e IMAGE_CHE="eclipse/che-server:nightly-openj9"
I may update the launch part with that flag

[skabashnyuk]

ok. Thx for clarification.

[benoitf]

@skabashnyuk I've updated build and run instructions