Split resource_setup for compute tests

Split up the resource_setup method for all the compute tests, as per the
latest spec.

Partially-implements bp:resource-cleanup

Change-Id: I6562534ca5eb5e33c6f8d6cbcac5e7735535916a
diff --git a/tempest/api/compute/admin/test_services_negative.py b/tempest/api/compute/admin/test_services_negative.py
index f97b343..2d4ec51 100644
--- a/tempest/api/compute/admin/test_services_negative.py
+++ b/tempest/api/compute/admin/test_services_negative.py
@@ -25,8 +25,8 @@
     """
 
     @classmethod
-    def resource_setup(cls):
-        super(ServicesAdminNegativeTestJSON, cls).resource_setup()
+    def setup_clients(cls):
+        super(ServicesAdminNegativeTestJSON, cls).setup_clients()
         cls.client = cls.os_adm.services_client
         cls.non_admin_client = cls.services_client