Update travis-ci badge

[ci skip]

MSP-11399

Use rapid7 fork and default branch (staging/rapid7)
Remove rubygems badge

MSP-11399

There is currently no plan to release Rapid7's changes to Aruba to
rubygems.  Users should reference rapid7/aruba using Gemfile :git.
Update gemnasium badge

MSP-11399
Update CodeClimate badge

MSP-11399
Ignore Rubymine project directory

MSP-11399
Add simplecov to specs

MSP-11399

Add simplecov as a development dependency.  Setup .simplecov to have
Changed group to highlight coverage on changed file and that works with
rake spec and Rubymine's coverage runs.  Simplecov is setup in
`spec/spec_helper.rb` when `require 'simplecov'` causes simplecov to
load the .simplecov.
Use simplecov in cucumber

MSP-11399
Fix rubocop offenses

MSP-11399
Merge branch 'feature/MSP-11399/simplecov' into feature/MSP-11399/tools-integration

MSP-11399

Conflicts:
	.gitignore
Add coveralls

MSP-11399