FMW image requires Java image with different tag than what is generated with OracleJava module

[jasonwjones]

The Dockerfile for FMW 12.2.1.4 is built using oracle/serverjre:8 as both its builder as well as its base image. This tag used to be generated when using the build script in the OracleJava module, but a change awhile ago altered the tag names for this image. It seems that for consistency it would be good to have the FMW image refer to a tag that gets built (such as oracle/serverjre:8-ol8) or that the tag for Java should be added back.