Support transaction peer recovery

[arthurdm]

Liberty has a peer recovery functionality where one instance can recover a transaction that was started by another instance.

The Open Liberty Operator will support this via:

• new CRD field(s) to toggle peer-recovery
  • need a size field
  • may or may not need a mount path (if it's always known, then we don't need it)
  • operator setups up shared PV for the deployment
• the Liberty pods will write certain files into this PV for the transaction
• operator gets notified of pod going away
• pick the lowest CPU utilization pod remaining in the deployment
• push config into the chosen pod that will alert it to recover orphaned transaction

We need to check with the transaction team how this changes when a database is used instead of a shared file system.