Merge pull request #12315 from gaurish/super

TypeError: superclass mismatch for class PostgreSQLAdapter

activerecord/test/cases/adapters/postgresql/statement_pool_test.rb

 require 'cases/helper'
 
-module ActiveRecord::ConnectionAdapters
+module ActiveRecord
+  module ConnectionAdapters
     class PostgreSQLAdapter < AbstractAdapter
       class InactivePGconn
         def query(*args)
@@ -36,4 +37,5 @@ def test_dealloc_does_not_raise_on_inactive_connection
         end
       end
     end
+  end
 end