cgroup_fj_common.sh: Disable cgroup controller in cleanup function

If you run "cgroup_fj_function.sh cpuset;cpuset_base_ops_testset.sh"
you will encounter following error and cpuset_base_ops will be skipped:

  cpuset_base_ops 1 TCONF: Could not mount cgroup filesystem with cpuset on /dev/cpuset

Signed-off-by: Wei Gao <wegao@suse.com>
Reviewed-by: Li Wang <liwang@redhat.com>

testcases/kernel/controllers/cgroup_fj/cgroup_fj_common.sh

@@ -76,6 +76,8 @@ common_cleanup()
     [ -d "$start_path" ] && find "$start_path" -depth -type d -exec rmdir '{}' \;
 
     cgroup_cleanup
+
+    [ "$cgroup_version" = "2" ] && ROD echo "-$subsystem" \> "/sys/fs/cgroup/cgroup.subtree_control"
 }
 
 . cgroup_lib.sh