Release 1.8.6

[GalRogozinski]

• Fix: LS taking too long (#1843)

• Feature: New milestone stage and solidification pipeline (#1844)

• Use LinkedBlockingQueue to fix sync problems (#1841)

• Up jackson version 2.9.10.3 (#1837)

• Feature: Add transaction solidifier queue (#1821)

• Fix: Update Broadcast Stage logic (#1827)

• Regression: Update pruning test (#1775)

• Test: Fix getinclusion assertion to what it should be (#1819)

• Add transaction solidifier (#1805)

• Move validation to validation service package (#1804)

• Update regression logging (#1803)

• Update regression structure (#1764)

• Rename zmq tx_trytes to trytes (#1772)

• Remove ping pong from reply stage (#1745)

• Fix: reference transaction logic in Regression Test (#1737)

• Feature: Db size in bytes (#1717)

• Fix: broken getInclusionStates API call (#1685)

• Feature: Use one RocksDB instance for spent addresses and local snapshots

• Fix: Stop submitting zero value bundles as a task into the SpentAddressesService (#1614)

• Fix: lower error severity for faulty neighbor to warning (#1710)

• Fix: sort milestone candidates before analyzing for faster solidification (#1660)

• Change: Regression tests to python3 (#1707)

• Feature: publish sn_trytes in zmq (#1551)

• Change: Count subtypes for pipeline threads (#1681)

• Remove magic numbers from handshake (#1694)

• Fix: Remove neighbors correctly (#1687)

• Fix: improve API error response for storeTransactions (#1686)

• Add spent addresses test (#1489)

• Fix: Correct walker behaviour for alpha == 0 (#1645)

• Allow to configure benchmark from CLI (#1663)

• Fix: Don't resave the transaction itself (#1671)

• Fix: Zmq documentation (#1665)

• Fix: file descriptors leak in IXI module (#1669)

• Fix: Updated db config loading to account for sections (#1667)

• Memory optimization for serializing db objects (#1656)

• Updated RocksDB to 6.3.6 (#1654)

• Feature: Allow users to tinker with RocksDB configuration via file and upgrade RocksDb (#1638)

• Feature: Truncate transaction bytes before persisting them to the database (#1635)

• Update Jdeb plugin (#1639)

• DB_PATH changed in README.md, .factorypath added to .gitignore

• adds config option to disable sync progress printing (#1649)

• Changed closing order for column family

• Updated rocksdb to 6.2.2

• Feature: DB size in getNodeInfo (#1750)

• Feature: improved logging for console pruning (#1731)

• Feature: Added check in transactionpruner for current jobs (#1735)

• Fix: remove threshold from getBalances API call (#1768)

• Fix: getTrytes API - add null to repsonse list if resulting tvm is missing (#1773)

• Add feature wereAddressesSpentFrom to getNodeInfo (#1780)

• Delete getTips api call (#1788)