* WIP, basic implementation
* Pull `if` branch into a variable
* Remove outdated javadoc
* Remove map iteration, use target name instead of id (whoops)
* Remove streaming from isReplacementSource
* Simplify getReplacementName
* Only calculate node shutdowns if canRemain==false and forceMove==false
* Move canRebalance comment in BalancedShardsAllocator
* Rename canForceDuringVacate -> canForceAllocateDuringReplace
* Add comment to AwarenessAllocationDecider.canForceAllocateDuringReplace
* Revert changes to ClusterRebalanceAllocationDecider
* Change "no replacement" decision message in NodeReplacementAllocationDecider
* Only construct shutdown map once in isReplacementSource
* Make node shutdowns and target shutdowns available within RoutingAllocation
* Add randomization for adding the filter that is overridden in test
* Add integration test with replicas: 1
* Go nuts with the verbosity of allocation decisions
* Also check NODE_C in unit test
* Test with randomly assigned shard
* Fix test for extra verbose decision messages
* Remove canAllocate(IndexMetadat, RoutingNode, RoutingAllocation) overriding
* Spotless :|
* Implement 100% disk usage check during force-replace-allocate
* Add rudimentary documentation for "replace" shutdown type
* Use RoutingAllocation shutdown map in BalancedShardsAllocator
* Add canForceAllocateDuringReplace to AllocationDeciders & add test
* Switch from percentage to bytes in DiskThresholdDecider force check
* Enhance docs with note about rollover, creation, & shrink
* Clarify decision messages, add test for target-only allocation
* Simplify NodeReplacementAllocationDecider.replacementOngoing
* Start nodeC before nodeB in integration test
* Spotleeeessssssss! You get me every time!
* Remove outdated comment
6e875d0fa9