unskip list server actions tests

Bug #1206032 is fixed, so we can unskip the
test_list_server_actions.

These tests are needed for response validation testing.

Closes-Bug: #1206032

Change-Id: I1891d1f4435c3b884b099497352084ba8271a859
diff --git a/tempest/api/compute/v3/servers/test_instance_actions.py b/tempest/api/compute/v3/servers/test_instance_actions.py
index 64339b8..4c2dcbe 100644
--- a/tempest/api/compute/v3/servers/test_instance_actions.py
+++ b/tempest/api/compute/v3/servers/test_instance_actions.py
@@ -27,7 +27,6 @@
         cls.resp = resp
         cls.server_id = server['id']
 
-    @test.skip_because(bug="1206032")
     @test.attr(type='gate')
     def test_list_server_actions(self):
         # List actions of the provided server