Refactors generate_linux_tests script (#236)
Refactors generate_linux_tests script (#236)

Motivation:

generate_linux_tests.rb is written in a non idiomatic way.

Modifications:

I used Rubocop to refactor the code.
More info: https://github.com/bbatsov/rubocop

Result:

A more idiomatic Ruby script.
apple/swift-nio,apple/swift-nio,apple/swift-nio,apple/swift-nio,apple/swift-nio