Revert "Update logback-classic to 1.4.0 (#1155)" (#1156)
Revert "Update logback-classic to 1.4.0 (#1155)" (#1156)

This reverts commit 5eedbfc43921baffc328d6bc92d1bd660d110352.
ReactiveMongo/ReactiveMongo,ReactiveMongo/ReactiveMongo