Patch the elasticsearch backend too

Required as this patch is still up for review:
https://review.opendev.org/c/openstack/kolla-ansible/+/898555

(cherry picked from commit 5888807)

Author: MoteHue

cloudkitty/storage/v2/elasticsearch/client.py

@@ -98,14 +98,15 @@ def _build_composite(self, groupby):
         sources = []
         for elem in groupby:
             if elem == 'type':
-                sources.append({'type': {'terms': {'field': 'type'}}})
+                sources.append({'type': {'terms': {'field': 'type.keyword'}}})
             elif elem == 'time':
                 # Not doing a date_histogram aggregation because we don't know
                 # the period
                 sources.append({'begin': {'terms': {'field': 'start'}}})
                 sources.append({'end': {'terms': {'field': 'end'}}})
             else:
-                sources.append({elem: {'terms': {'field': 'groupby.' + elem}}})
+                field = 'groupby.' + elem + '.keyword'
+                sources.append({elem: {'terms': {'field': field}}})
 
         return {"sources": sources}
 

cloudkitty/tests/storage/v2/elasticsearch/test_client.py

@@ -86,9 +86,9 @@ def test_build_composite(self):
         self.assertEqual(
             self.client._build_composite(['one', 'type', 'two']),
             {'sources': [
-                {'one': {'terms': {'field': 'groupby.one'}}},
-                {'type': {'terms': {'field': 'type'}}},
-                {'two': {'terms': {'field': 'groupby.two'}}},
+                {'one': {'terms': {'field': 'groupby.one.keyword'}}},
+                {'type': {'terms': {'field': 'type.keyword'}}},
+                {'two': {'terms': {'field': 'groupby.two.keyword'}}},
             ]},
         )