fixes for failing unit tests
Merge branch '2.5-voron' of https://github.com/ppekrol/ravendb into 2.5-voron

Conflicts:
	Raven.Database/Storage/Voron/StorageActions/DocumentsStorageActions.cs
	Raven.Database/Storage/Voron/StorageActions/StalenessStorageActions.cs
Merge branch '2.5-voron' of https://github.com/ppekrol/ravendb into 2.5-voron

Conflicts:
	Raven.Database/Storage/Voron/StorageActions/AttachmentsStorageActions.cs
	Raven.Voron/Voron/Impl/WriteBatch.cs
git pull from ppekrol/2.5-voron
Merge branch '2.5-voron' of https://github.com/ppekrol/ravendb into 2.5-voron
Merge branch '2.5-voron' of https://github.com/ppekrol/ravendb into 2.5-voron
tweaked bug fix --> so MoveLeafNode() in rebalancer will copy source node's flags