nwfilter_dumpxml: Add acl test cases for nwfilter api 'read' and 'getattr'

By default, access for nwfilter api 'read' and 'getattr' is granted
for unprivileged user, add test cases for this via nwfilter-dumpxml
command.

Signed-off-by: Wayne Sun <gsun@redhat.com>
nwfilter_list: add acl test case for nwfilter api 'getattr'

By default, access for nwfilter api 'getattr' is granted for
unprivileged user, add test cases for this via nwfilter-list
command.

Signed-off-by: Wayne Sun <gsun@redhat.com>
Merge pull request #337 from waynesun09/acl_nwfilter_misc

Add acl test cases for nwfilter api 'read' and 'getattr'