ftests: Add to test to validate cgset's systemd options (cgroup v1)

ftests: Add to test to validate cgset's systemd options (cgroup v1)

Add a test case to validate cgset tool's systemd options on cgroup
legacy and hybrid setup modes.

-----------------------------------------------------------------
Test Results:
        Run Date:                          Feb 05 12:53:35
        Passed:                                  1 test(s)
        Skipped:                                 0 test(s)
        Failed:                                  0 test(s)
-----------------------------------------------------------------
Timing Results:
        Test                             Time (sec)
        -------------------------------------------
        setup                                  0.00
        063-sudo-systemd_cgset-v1.py           2.20
        teardown                               0.00
        -------------------------------------------
        Total Run Time                         2.20

[Kamalesh improvised on the original test case]
Signed-off-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>