Add total() to both secrets and orders.

barbicanclient/base.py

@@ -26,3 +26,13 @@ class BaseEntityManager(object):
         for k in dictionary.keys():
             if dictionary[k] is None:
                 dictionary.pop(k)
+
+    def total(self):
+        """
+        Returns the toatl number of entities stored in Barbican.
+        """
+        href = '{0}/{1}'.format(self.api.base_url, self.entity)
+        params ={'limit': 0, 'offset': 0}
+        resp = self.api.get(href, params)
+
+        return resp['total']