HBASE-12616 We lost the linked list commands in recent usage refactoring
HBASE-12614 Potentially unclosed StoreFile(s) in DefaultCompactor#compact()
HBASE-12398 Region isn't assigned in an extreme race condition (Jeffrey Zhong)
HBASE-11099 Two situations where we could open a region with smaller sequence number (Stephen Jiang)
HBASE-12618 Add 'Namespace' to headers while displaying user permissions (Ashish Singhi)