ftests: Add cgget test with no flags

ftests: Add cgget test with no flags

Add a cgget test that exercises the following format:
	cgget CgroupName

-----------------------------------------------------------------
Test Results:
        Run Date:                          Apr 14 10:57:44
        Passed:                                  1 test(s)
        Skipped:                                 0 test(s)
        Failed:                                  0 test(s)
-----------------------------------------------------------------
Timing Results:
        Test                                    Time (sec)
        ---------------------------------------------------------
        setup                                         0.00
        033-cgget-no_flags.py                         0.11
        teardown                                      0.00
        ---------------------------------------------------------
        Total Run Time                                0.11

Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>