[MERGE] devel-2.7 into master

[Michael Hanselmann]

commit cc80a81 (HEAD, master)
Merge: cfc2464 e500d25
Author: Michael Hanselmann <han...@google.com>
Date:   Fri Feb 1 17:19:34 2013 +0100

    Merge branch 'devel-2.7'
    
    * devel-2.7: (24 commits)
      Fix typo in ganeti-noded man page
      QA: Run instance tests with different cluster configurations
      QA: Run cluster-verify after instance tests
      QA: Refactored launching of the various instance tests
      QA: Use lists of nodes as argument to instance tests
      QA: Instance tests check the configuration before running
      QA: Added functions to allocate/free N nodes at once
      QA: Added exclusive_storage to qa_config
      QA: Better initialization of a global dictionary
      QA: Added disk template to config
      QA cleanup: Removed instance-disk-failure test
      QA fix: TestInstanceExportWithRemove() updates configuration
      QA: Cluster-verify reports shared PVs with exclusive storage
      QA: Added constants for LVM volumes
      QA: Templates incompatible with exclusive storage reported
      QA: Uniformity check for exclusive_storage in cluster-verify
      QA: Test for basic features of exclusive storage
      QA: Added function to read cluster configuration fields
      QA: Added function to check cluster-verify result
      Document better gnt-network
      ...