Consensus release for node 10.6

[jasagredo]

This is an aggregation of the issues and PRs we would like to get merged for node 10.6:

• Integration
  • Integrate newer cardano-ledger version #1525
• Reproducible snapshots
  • LedgerDB V2: handles aren't closed in the common case #1515 LedgerDB.V2: make sure to actually close handles #1516
  • [FEAT] - Snapshot at predictable points #1424
    • LedgerDB: prune on garbage collection instead of on every change #1513
• Queries
  • Do not create golden files for unsupported queries #1539
  • New(GetPoolDistr|GetStakeDistribution)2 returning ledger types #1540
• CDDLs
  • Add NTN CDDLs #1422

[jasagredo]

Closed in favor of Consensus Team Backlog (view)