Elytron Integration with Core

This is the top level tracking task for Elytron integration within core. The tasks for the changes actually being made will either be linked or added as sub-tasks.

In addition to this general issues that affect the Elytron integration are being labelled with 'affects_elytron' and can be queried using the following query: -
https://issues.jboss.org/issues/?filter=12323574

The label is a general catch-all for issues that are of interest to us but are not automatically blockers for our progress.

The general criteria for the resolution of this issue will be: -

• Inclusion of the Elytron Subsystem in core
• All network entry points in core to be securable using Elytron
• All SSL artefacts to be obtainable from Elytron.

Note: The legacy modes will become better defined as we progress but whilst it must be possible to use Elytron it's use may still be optional to a certain degree.