SERVER-13635: clean database close path
SERVER-13635: change ownership of DatabaseCatalogEntry, now StorageEngine owns
SERVER-13635: move dropDatabase real work to StorageEngine
SERVER-13635: more jstests work with generic storage engine
SERVER-13635: move database case handling above storage engine layer
SERVER-13635: move mmapv1 specific capped test
SERVER-1153: clean max handling in heap1 capped collection
SERVER-13635: make all capped jstests generic
SERVER-13635: fix cloneCollectionAsCapped skipping optimization to be generic
SERVER-13635: RecordStore::ns method to return namespace