Adding jdk target for java builds
Adds "JDK" versions of images for 17 and 21. There is now JDK package in yum for Java 11.
Additionally adds support to push images in developer forks so we can test the pipelines and images before merging into upstream. Developers can add a FORCE_IMAGE_PUSH=true
variable in their project to enable pushing.
Closes #13 (closed)
Edited by Martinez, Eric M.