Reflect new ES api for get aliases.

see https://github.com/elasticsearch/elasticsearch/issues/4539 for more
details

Changelog.rst

@@ -3,6 +3,13 @@
 Changelog
 =========
 
+0.4.5 (dev)
+-----------
+
+ * `get_alias` now has `name` as another optional parameter due to issue #4539
+   in es repo. Note that the order of params have changed so if you are not
+   using keyword arguments this is a breaking change.
+
 0.4.4 (2013-12-23)
 ------------------
 

elasticsearch/client/indices.py

@@ -301,7 +301,7 @@ class IndicesClient(NamespacedClient):
         return True
 
     @query_params('allow_no_indices', 'expand_wildcards', 'ignore_indices', 'ignore_unavailable')
-    def get_alias(self, name, index=None, params=None):
+    def get_alias(self, index=None, name=None, params=None):
         """
         Retrieve a specified alias.
         `<http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-aliases.html>`_