Refine create default data.

- Rename file to create_default_data.

- Refine code to work with default data specified in YAML.
Add YAML to specify default data.

- Add YAML to specify default data.
Refine rake tasks.

- Refine rake tasks to work with default data.
Use correct file names to load them.

- Use correct file names to load them.
Create rake tasks

- Create a rake task to create default classes.

- Create a rake task which calls other rake task
  to create default data.
Call rake task to create default data.

- Call a rake task to create default data.
Refactor code

- Change key name to :password_for_default_users.
Fix feature test

- Fix feature test by removing class from background data.
Modify default data for test cleanup

- Modify default data for test cleanup.
Modify step def for login

- Modify step def for login.
Add 'default_data.yml' information in step def

- Ad 'default_data.yml' information in step def.
Fix feature test

- Fix feature test by removing class from background data.
Fix feature test

- Fix feature test by adding class to school.
Refine default data creation.

- Refine default data creation methods and rake task.
Refine Default data YAML

- Add UUID to all the objects.
Refine settings.sample

- All default user password for each envronments.
Merge updates into test cleanup branch

- Merge branch 'pull_request_03_12_2013_a'
  into test_cleanup_03_18_2013_a
Merge test cleanup progress

- Merge branch 'test_cleanup_03_13_2013_a'
  into test_cleanup_03_18_2013_a
Merge test cleanup progress

- Merge branch 'test_cleanup_03_13_2013_a'
  into test_cleanup_03_18_2013_a
Fix white spaces in feature files

- Fix white spaces in feature files.