Remove limitation for elasticsearch library (apache#16553)

* Remove limitation for elasticsearch library

Elasticsearch <7.6.0 does not work with Python 3.9 (import
errors on deprecated base64 functionality that have been removed
in Python 3.9) see:

ihttps://bugzilla.redhat.com/show_bug.cgi?id=1894188

This PR bumps elasticsearch library version to latest available
(7.13.1 as of this writing) in order to get it Python 3.9
compatible.

(cherry picked from commit e5e59b4)

setup.py

@@ -275,8 +275,8 @@ def get_sphinx_theme_version() -> str:
     'pydruid>=0.4.1',
 ]
 elasticsearch = [
-    'elasticsearch>7, <7.6.0',
-    'elasticsearch-dbapi==0.1.0',
+    'elasticsearch>7',
+    'elasticsearch-dbapi',
     'elasticsearch-dsl>=5.0.0',
 ]
 exasol = [

tests/providers/elasticsearch/log/elasticmock/fake_elasticsearch.py

@@ -88,7 +88,7 @@ def info(self, params=None):
         'version',
         'version_type',
     )
-    def index(self, index, doc_type, body, id=None, params=None):
+    def index(self, index, doc_type, body, id=None, params=None, headers=None):
         if index not in self.__documents_dict:
             self.__documents_dict[index] = []
 
@@ -98,10 +98,24 @@ def index(self, index, doc_type, body, id=None, params=None):
         version = 1
 
         self.__documents_dict[index].append(
-            {'_type': doc_type, '_id': id, '_source': body, '_index': index, '_version': version}
+            {
+                '_type': doc_type,
+                '_id': id,
+                '_source': body,
+                '_index': index,
+                '_version': version,
+                '_headers': headers,
+            }
         )
 
-        return {'_type': doc_type, '_id': id, 'created': True, '_version': version, '_index': index}
+        return {
+            '_type': doc_type,
+            '_id': id,
+            'created': True,
+            '_version': version,
+            '_index': index,
+            '_headers': headers,
+        }
 
     @query_params('parent', 'preference', 'realtime', 'refresh', 'routing')
     def exists(self, index, doc_type, id, params=None):
@@ -198,7 +212,7 @@ def get_source(self, index, doc_type, id, params=None):
         'track_scores',
         'version',
     )
-    def count(self, index=None, doc_type=None, body=None, params=None):
+    def count(self, index=None, doc_type=None, body=None, params=None, headers=None):
         searchable_indexes = self._normalize_index_to_list(index)
         searchable_doc_types = self._normalize_doc_type_to_list(doc_type)
 
@@ -247,7 +261,7 @@ def count(self, index=None, doc_type=None, body=None, params=None):
         'track_scores',
         'version',
     )
-    def search(self, index=None, doc_type=None, body=None, params=None):
+    def search(self, index=None, doc_type=None, body=None, params=None, headers=None):
         searchable_indexes = self._normalize_index_to_list(index)
 
         matches = self._find_match(index, doc_type, body)
@@ -275,7 +289,7 @@ def search(self, index=None, doc_type=None, body=None, params=None):
     @query_params(
         'consistency', 'parent', 'refresh', 'replication', 'routing', 'timeout', 'version', 'version_type'
     )
-    def delete(self, index, doc_type, id, params=None):
+    def delete(self, index, doc_type, id, params=None, headers=None):
 
         found = False