fix the function named get_count_all

To achieve a unified style in the cluster.py,add function annotation
and rename the third parameter

Change-Id: I271910695d32c06c46e9cf01e072fb756a33cd76

magnum/objects/cluster.py

@@ -139,8 +139,17 @@ class Cluster(base.MagnumPersistentObject, base.MagnumObject,
         return cluster
 
     @base.remotable_classmethod
-    def get_count_all(cls, context, **kwargs):
-        return cls.dbapi.get_cluster_count_all(context, **kwargs)
+    def get_count_all(cls, context, filters=None):
+        """Get count of matching clusters.
+
+        :param context: The security context
+        :param filters: filter dict, can includes 'cluster_template_id',
+                        'name', 'node_count', 'stack_id', 'api_address',
+                        'node_addresses', 'project_id', 'user_id',
+                        'status'(should be a status list), 'master_count'.
+        :returns: Count of matching clusters.
+        """
+        return cls.dbapi.get_cluster_count_all(context, filters=filters)
 
     @base.remotable_classmethod
     def get_by_name(cls, context, name):

magnum/tests/unit/objects/test_objects.py

@@ -355,7 +355,7 @@ class TestObject(test_base.TestCase, _TestObject):
 # For more information on object version testing, read
 # http://docs.openstack.org/developer/magnum/objects.html
 object_data = {
-    'Cluster': '1.13-87f9b6ff2090663d69a1de2e95c50a27',
+    'Cluster': '1.13-5da08d5f023eab4c5657c3fb6997e44c',
     'ClusterTemplate': '1.17-74e4e6b1faca768714be809a828599c2',
     'Certificate': '1.1-1924dc077daa844f0f9076332ef96815',
     'MyObj': '1.0-34c4b1aadefd177b13f9a2f894cc23cd',