Use and generate 1.9 hash syntax

[mvz]

Summary

Use modern hash syntax since cucumber-rails only supports Rubies that can handle it.

Details

This updates both cucumber-rails' code and templates to use and generate modern hash syntax.

Motivation and Context

This removes the need to fix the code in each project after it has been generated.

How Has This Been Tested?

Existing tests and scenarios should still pass.

Types of changes

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).

Checklist:

• I've added tests for my code.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[xtrasimplicity]

Looks good to me! LGTM. :)