ftests: Add recursive cgdelete function test on shared mount

ftests: Add recursive cgdelete function test on shared mount

Add a test that tries deleting non-existing cgroups on shared mount
mount shared by controllers on cgroup v1.

-----------------------------------------------------------------
Test Results:
        Run Date:                          Jan 23 09:21:48
        Passed:                                  1 test(s)
        Skipped:                                 0 test(s)
        Failed:                                  0 test(s)
-----------------------------------------------------------------
Timing Results:
        Test                                                  Time (sec)
        ----------------------------------------------------------------
        setup                                                       0.00
        098-cgdelete-non-existing-shared-mnt-cgroup-v1.py           0.03
        teardown                                                    0.00
        ----------------------------------------------------------------
        Total Run Time                                              0.03

Signed-off-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>
TJH: Fix minor variable name typo.  Also, add the new test to the EXTRA
     DIST list in Makefile.am