Unskip test_register_get_deregister_ari_image

The test case skiped because of invalid state transitions and because of
wrong relative path handling, both issue has been fixed.
rong relative path handling, both issue has been fixed.

Change-Id: Ie8b4cb4ee69fb6765351cee9414d599cbae63db8
diff --git a/tempest/thirdparty/boto/test_s3_ec2_images.py b/tempest/thirdparty/boto/test_s3_ec2_images.py
index 0f836d0..5e1e2cb 100644
--- a/tempest/thirdparty/boto/test_s3_ec2_images.py
+++ b/tempest/thirdparty/boto/test_s3_ec2_images.py
@@ -17,8 +17,6 @@
 
 import os
 
-import testtools
-
 from tempest import clients
 from tempest.common.utils.data_utils import rand_name
 from tempest.test import attr
@@ -107,7 +105,6 @@
             self.images_client.get_all_images()))
         self.cancelResourceCleanUp(image["cleanUp"])
 
-    @testtools.skip("Skipped until the Bug #1074908 and #1074904 is resolved")
     def test_register_get_deregister_ari_image(self):
         # Register and deregister ari image
         image = {"name": rand_name("ari-name-"),