Note: This would be a good job for someone who understands maven quite well - or who wants to learn.

The goal of the task is to make the IGB POM simpler and more understandable. It looks like the POM property log4JVersion is not be used anywhere and can be deleted, which will simplify the POM. This task is to investigate that and delete if if possible.

Background:

The IGB project uses SLF4J as its logging system. SLF4J - Simple Logging Facade for Java - is basically just an API "facade" for various logging systems you can include in a Java project. In all of IGB's bundles, we include the facade API as a dependency. When we build IGB itself, we also include an implementation of the logging framework. None of the bundles needs to know anything about which framework implementation is being used. Only the master build logic that creates the final platform jar should specify the particular logging implementation.

Note that this is complicated by the fact that some of the 3rd-party jars we include might declare dependencies on specific logging framework implementations, which would be bad. I have not checked if this is happening.

For some reason, the parent IGB POM creates a property called log4JVersion, but it is not used anywhere in the parent POM. For this task, use grep or whatever tools you like to find out if any of the child modules in "core" or "plugins" or wherever are using this property. If they are, investigate why. If they are using any older, non-SLF4J logging system, change this so that they are using SLF4J.

Note that the story point estimate assumes you will not have to change any code – just delete and un-used property. If this is not the case, please update the story points to show the greater effort.