Merge branch 'devel-2.7'

* devel-2.7:
  Redirect output for gnt-* list/list-fields commands
  Add function to execute QA commands with redirected output
  Implement option to skip logging of QA commands
  Fix typo in a comment
  Add some more Haskell/Python equivalence tests
  Fix Haskell log file naming after virtual cluster changes
  QA: Clean up after "instance-remove-drbd-offline" test
  Switch KVM to multi-error verify results
  Make LXC fail verification if cgroup is not mounted
  Add a helper function for hypervisor verification
  hv_lxc: fix whitespace errors
  s/nic/NIC/ in manpages
  LXC: add support for the memory controller
  LXC: adapt hv for newer lxc userspace tools

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Bernardo Dal Seno <bdalseno@google.com>