Fix an error for RSpecRails/HttpStatus

[ydah]

Fix: rubocop/rubocop-rspec_rails#9

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Before submitting the PR make sure the following are checked:

• Feature branch is up-to-date with master (if not - rebase it).
• Squashed related commits together.
• [-] Added tests.
• Updated documentation.
• Added an entry to the CHANGELOG.md if the new code introduces user-observable changes.
• The build (bundle exec rake) passes (be sure to run this locally, since it may produce updated documentation that you will need to commit).

[Strech]

I'm confused with a new set of dependencies, why rubocop-rspec depends on rubocop-rspec_rails when rspec is completely independent of Rails?

[ydah]

This was temporarily revived, so close it.

[ydah]

I'm confused with a new set of dependencies, why rubocop-rspec depends on rubocop-rspec_rails when rspec is completely independent of Rails?

For backward compatibility. The next major version will be completely independent.