Remove the skip for test_get_instance_action()

Change Ia1880dd53b7cbf34e66b349f01afb15672dffd12 introduced a skip
for InstanceActionsV3Test.test_get_instance_action(). This was due
to the header x-compute-request-id being changed to
x-openstack-request id. The name has since been updated (as nova
change I5e370fd3de5ee2f8a8d13553015d88910ff5ea87), so the skip
is no longer needed.

Also the skip in change Ia493d4838dee4a8a587d12a55f16afeb143d959d
is no longer needed.

Closes-Bug: 1281915
Change-Id: I4839ba9287f792c8ed352bb63391285a3afc0b84
diff --git a/tempest/api/compute/v3/servers/test_instance_actions.py b/tempest/api/compute/v3/servers/test_instance_actions.py
index 399541b..64339b8 100644
--- a/tempest/api/compute/v3/servers/test_instance_actions.py
+++ b/tempest/api/compute/v3/servers/test_instance_actions.py
@@ -40,12 +40,10 @@
         self.assertTrue(any([i for i in body if i['action'] == 'create']))
         self.assertTrue(any([i for i in body if i['action'] == 'reboot']))
 
-    @test.skip_because(bug="1206032")
     @test.attr(type='gate')
-    @test.skip_because(bug="1281915")
     def test_get_server_action(self):
         # Get the action details of the provided server
-        request_id = self.resp['x-compute-request-id']
+        request_id = self.resp['x-openstack-request-id']
         resp, body = self.client.get_server_action(self.server_id,
                                                    request_id)
         self.assertEqual(200, resp.status)