rails/rails — pull request #9876 by macksmind (2013-03-22 15:13:13+00:00)
Title: Restore columns dropped by hstore test

Disabling the hstore extension during testing created order dependent
test failures.

One way to view the problem in master is:
```
ARCONN=postgresql bundle exec ruby -wI.:test -e "%w{test/cases/adapters/postgresql/hstore_test.rb test/cases/schema_dumper_test.rb}.each { |f| require f }"
```