[7.14] Make resolved values into strings before substituting into string value

Author: V1NAY8

test_elasticsearch/test_server/test_rest_api_spec.py

@@ -402,7 +402,7 @@ def _resolve(self, value):
                         and isinstance(value, string_types)
                         and key_replace in value
                     ):
-                        value = value.replace(key_replace, v)
+                        value = value.replace(key_replace, str(v))
                         break
 
         if isinstance(value, string_types):