Merge branch 'devel-2.1'

* devel-2.1: (29 commits)
  RAPI client: Improve SSL error reporting
  RAPI client: Don't check node role in client
  RAPI client: Update ReplaceInstanceDisks
  RAPI client: Fix behaviour of “allocatable” storage flag
  RAPI client: Encode boolean and None query values
  RAPI client: No longer check storage type locally
  RAPI client: Add constant for RAPI version
  RAPI QA: Use RAPI client
  QA: Restore RAPI cert after “gnt-cluster renew-crypto”
  QA: Add function create temporary backup file
  RAPI client: Don't assume job IDs to be numeric
  Add RAPI client utility module with RAPI PollJob function
  RAPI client: Include HTTP error code in GanetiApiError exception
  Support different HTTP error codes in RAPI client unittest mock
  RAPI client: Fix error message for unsupported methods in unittest
  RAPI client: Allow waiting for job changes
  RAPI: Allow waiting for job changes
  RAPI client: Rename “DeleteJob” to “CancelJob”
  RAPI client: Various code style changes
  RAPI client: Add missing unittest for RepairNodeStorageUnits
  ...

Conflicts:
	qa/qa_cluster.py: Trivial

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Luca Bigliardi <shammash@google.com>