Split resource_setup for limit tests

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

Partially-implements bp:resource-cleanup

Change-Id: Idcd56f6cf8127f41863c5f9335272503888d2cc8
diff --git a/tempest/api/compute/limits/test_absolute_limits.py b/tempest/api/compute/limits/test_absolute_limits.py
index 520dfa9..de6eecb 100644
--- a/tempest/api/compute/limits/test_absolute_limits.py
+++ b/tempest/api/compute/limits/test_absolute_limits.py
@@ -20,8 +20,8 @@
 class AbsoluteLimitsTestJSON(base.BaseV2ComputeTest):
 
     @classmethod
-    def resource_setup(cls):
-        super(AbsoluteLimitsTestJSON, cls).resource_setup()
+    def setup_clients(cls):
+        super(AbsoluteLimitsTestJSON, cls).setup_clients()
         cls.client = cls.limits_client
 
     @test.attr(type='gate')
diff --git a/tempest/api/compute/limits/test_absolute_limits_negative.py b/tempest/api/compute/limits/test_absolute_limits_negative.py
index 9776db3..d82a2e5 100644
--- a/tempest/api/compute/limits/test_absolute_limits_negative.py
+++ b/tempest/api/compute/limits/test_absolute_limits_negative.py
@@ -28,8 +28,8 @@
         super(AbsoluteLimitsNegativeTestJSON, self).setUp()
 
     @classmethod
-    def resource_setup(cls):
-        super(AbsoluteLimitsNegativeTestJSON, cls).resource_setup()
+    def setup_clients(cls):
+        super(AbsoluteLimitsNegativeTestJSON, cls).setup_clients()
         cls.client = cls.limits_client
         cls.server_client = cls.servers_client