run_pylint.py: Ignore errors E0611 on pylint

Since they are mostly noise due to the different ways the
autotest libraries may be organized.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
cgroup_tests: Fix py 2.4 invalid construct

It's illegal in python 2.4 to define classes like:

class MyClass():

Instead, make it inherit from object (new style class).

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
cgroup_test: Make user can run part of test cases

In the future there will be several test cases in cgroup_test
module, and they have no relationship. For now, these cases just
run integrally, user cannot run desired case. So I do some modify
to adapt this situation.

1.test.cfg can desire which test case you want to run.
2.Defaultly test.cfg contains all the testcases, you
  can modify its detail to run different case.
3.When new test is added, no need to modify cgroup_test.py
  any more, and test case's form like this:
  class test_module(object):
      test()
  def execute(cgroup_cls):
      test_mod = test_module(cgroup_cls.xxx)
      test_mod.test()

Signed-off-by: Li Yang <liyang.fnst@cn.fujitsu.com>