This patch changes logic from counting all nodes to counting only
read-write nodes when messaging about DML operations.
feat(MCOL-6082): Multiple readers of dbroots using OamCache logic
This patch introduces centralized logic of selecting what dbroot is
accessible in PrimProc on what node. The logic is in OamCache for time
being and can be moved later.
Fix build
With an API txn (and likely other scenarios) cleartablelock will roll
back the txn and lock but leave a stale txn pointer in the BRM. This
causes restart/shutdown to warn that transactions are still open.
This patch makes sure BRM removes the txn from the list.