Merge branch 'stable-2.11' into stable-2.12

Merge branch 'stable-2.11' into stable-2.12

* stable-2.11
  Renew crypto retries for non-master nodes
  Retries for the master's SSL cert renewal
  Unit tests for offline nodes
  De-duplicate testing code regarding pathutils
  Make LURenewCrypto handle unreachable nodes properly
  Error handling on failed SSL cert renewal for master
  Unit test for LURenewCrypto's valid case
  Mock support for pathutils
  Increase timeout of crypto token RPC

 Conflicts:
	lib/cmdlib/cluster.py
	test/py/cmdlib/cluster_unittest.py
	test/py/cmdlib/testsupport/__init__.py

 Resolution:
        for all affected files: update changes to
        configuration handling

Signed-off-by: Helga Velroyen <helgav@google.com>
Reviewed-by: Petr Pudlak <pudlak@google.com>