Require rails 4.0.0.rc1 and get bundle to work

ransack and deface were commented out for now because they require rails
3 versions

Also there's no need to require strong_parameteres gem now since it's
built in rails 4. At this point core test suite run but a bunch of specs
fail and zillions warnings are displayed
Bump database_cleaner to fix transaction issue
More tweaks down to 7 failures on core

  * Fix shipping method zones association
  * Update envinroment test.rb template
  * Fixes failing specs
  * require ransack rails4 branch

[Fixes #3094]