* stable-2.13
  Rename SSH Update evaluation function more expressively
  Using named tuple for node info in ssh file manager
  Helper functions to assert key existence for sets of nodes
  Add RetryByNumberOfTimes utility function

* stable-2.12
  Revision bump to 2.12.3
  Update NEWS for 2.12.3

Conflicts:
	lib/cmdlib/cluster/verify.py: take stable-2.14
	lib/utils/retry.py: take both additions

Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Petr Pudlak <pudlak@google.com>