Merge remote branch 'origin/master' into mogu

Merge remote branch 'origin/master' into mogu

* origin/master:
  Fix burnin's verbose mode
  Final NEWS update and version increase for 2.0.4
  Encode the actual exception raised by LU execution
  Move the luxi error handling into errors.py
  Fix the confusing ssh/hostname message in node add
  Add man page for ganeti-cleaner
  Update NEWS file for version 2.0.4
  Automatically cleanup _temporary_ids at save
  Separate the computation of all config IDs
  Change config upgrade to be explicit
  Fix unittest breakage due to new test file
  Fix /proc/drbd parsing in presence of gaps
  repair-size: ensure child disks have sane sizes
  Fix yet another bug in LURepairDiskSizes
  Fix a bug in LURepairDiskSizes

Conflicts:
	NEWS          (trivial, the RST change)
	lib/cmdlib.py (trivial, some small change in 2.0)
	lib/config.py (due to the cherry-picks and UUID changes in 2.1)

Signed-off-by: Iustin Pop <iustin@google.com>