Append jdk images with -gha and add deprecation warning to original.

[JeroenKnoops]

As part of #53 we need to perform the first step:

Create new docker-image based on the original with -gha appended to the tag and add deprecation warning to the original.

• Create new image based on original with -gha appended to it.
• Make sure the build order is correct to ensure the correct base image.
• Add deprecation warning to original image.