Merge branch 'devel-2.5'

* devel-2.5:
  jqueue: Factorize checking job processor's result
  jqueue unittest: Rename simple fake-job class
  jqueue: Fix epylint errors introduced in 37d76f1e
  jqueue: Fix deadlock between job queue and dependency manager
  locking: Add “__repr__” to SharedLock and PipeCondition
  daemon.GenericMain: Don't generate backtrace on conflicting daemons
  utils.io.WritePidFile: Improve error reporting
  utils.ListVisibleFiles: Hide “lost+found” directories
  Fix race condition in test for *FileID functions

Conflicts:
	lib/utils/io.py: Trivial

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>