ftests: Add a test for cgroup_add_all_controllers()

ftests: Add a test for cgroup_add_all_controllers()

Add a test for cgroup_add_all_controllers()

-----------------------------------------------------------------
Test Results:
	Run Date:                          Mar 04 04:00:53
	Passed:                                  1 test(s)
	Skipped:                                 0 test(s)
	Failed:                                  0 test(s)
-----------------------------------------------------------------
Timing Results:
	Test                                                Time (sec)
	--------------------------------------------------------------
	setup                                                     0.00
	074-pybindings-cgroup_add_all_controllers-v1.py           0.13
	teardown                                                  0.00
	--------------------------------------------------------------
	Total Run Time                                            0.13

Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>
Reviewed-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>