Merge branch 'devel-2.7'

* devel-2.7
  Add QA for instance creation with policy violation
  Add QA for policy-instance interactions
  Add QA for cluster policies
  Unit tests for objects.InstancePolicy + a fix
  Unit tests for objects.FillIPolicy() + small fix
  Fix upgrade of policy in objects.Cluster
  Fix instance policy checks for default back-end parameters
  Fix restoring default instance specs in group policies
  Unit tests for cmdlib._GetUpdatedIPolicy()
  Fix policy check for disk templates
  Fix merge 8e09e801 that resulted in duplicated code
  GanetiRapiClient: fix the no_remember option

Conflicts:
	qa/qa_cluster.py
	qa/qa_instance.py

Conflicts are due to QA config in master using objects instead of
dictionaries. Also updated some new QA code in devel for the same reason.

Signed-off-by: Bernardo Dal Seno <bdalseno@google.com>
Reviewed-by: Guido Trotter <ultrotter@google.com>