When run the case balloon_check.balloon_evict.balloon-migrate,
it will get 'SKIP' result becasue the needed command
'migration_test_command' has been removed.This command
will be used in migration tests.

Readd the command to solve this problem.
Signed-off-by: NMike Qiu <qiudayu@linux.vnet.ibm.com>

Update the related new parameters and separated the enlarge and evict
cases
Signed-off-by: NYiqiao Pu <ypu@redhat.com>

Signed-off-by: NYiqiao Pu <ypu@redhat.com>

Make the free memory check command configurable.

changes from v1:
  - Add the Windows guest memory judge code as the value get from
    windows should charge with different method.
Signed-off-by: NYiqiao Pu <ypu@redhat.com>

Signed-off-by: NQingtang Zhou <qzhou@redhat.com>
Acked-by: NFeng Yang <fyang@redhat.com>

A frequent request we've got from users is that the name
'kvm' makes assumptions that are not true for a lot of
the use cases of the test suite. Then let's rename
the subtest 'kvm' to 'qemu', making it more accurate.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

For tests that are specific to one virt type, and are hosted on
that virt type directory, make the virt_test_type a non requirement
by auto generating it.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

In order to have self describing tests, split the original
subtests.cfg in several per test files, and create subtests.cfg
out from this information.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>