Modify failed tests

* These options are not implemented at rails 4.1.1
* for rspec 3.0.0
  * rspec/autorun is deprecated
  * `its` is removed and use rspec-its
* Generate .rspec (via. rspec --init)
* Add debug gems
* Many warnings in gems !
* Refactor: extract rescue to rescue_from for dev testing
* Use mocked redis and memcache when test