secret_dumpxml: add acl test cases for secret api 'read' and 'getattr'

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

Signed-off-by: Wayne Sun <gsun@redhat.com>
secret_list: add acl test cases for secret api 'getattr'

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

Signed-off-by: Wayne Sun <gsun@redhat.com>
Merge pull request #338 from waynesun09/acl_secret_misc

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