bumped logback version to 1.2.0

4 jobs for master in 1 minute and 5 seconds (queued for 1 second)
Status Name Job ID Coverage
  Linux
canceled githubjob #1771754

00:01:05

canceled masterJobLinux #1771755

00:01:04

canceled githubjob #1731534

00:01:33

canceled masterJobLinux #1731535

00:01:33