(QENG-2246) Add Travis CI

This commit adds a Rakefile, Gemfile, and Travis CI config file.

The Rakefile contains two tasks: test and junit. Both targets execute
the spec tests, with the difference being how the results are presented.

The Gemfile defines dependencies and a test group. To install just the
gems needed for running the application, execute:
  * `bundle install --without test`

The new .travis.yml file is for Travis CI and targets the major ruby
versions.

.travis.yml

@@ -0,0 +1,7 @@
+language: ruby
+rvm:
+  - 1.9.3
+  - 2.1.1
+  - 2.2.1
+  - 2.2.2
+  - jruby-1.7.8

Gemfile

@@ -0,0 +1,15 @@
+source ENV['GEM_SOURCE'] || 'https://rubygems.org'
+
+gem 'json', '>= 1.8'
+gem 'rack', '>= 1.6'
+gem 'rake', '>= 10.4'
+gem 'rbvmomi', '>= 1.8'
+gem 'redis', '>= 3.2'
+gem 'sinatra', '>= 1.4'
+
+# Test deps
+group :test do
+  gem 'rack-test', '>= 0.6'
+  gem 'rspec', '>= 3.2'
+  gem 'yarjuf', '>= 2.0'
+end

Rakefile

@@ -0,0 +1,13 @@
+require 'rspec/core/rake_task'
+
+desc 'Run rspec tests with coloring.'
+RSpec::Core::RakeTask.new(:test) do |t|
+  t.rspec_opts = %w[--color]
+  t.pattern    = 'spec/'
+end
+
+desc 'Run rspec tests and save JUnit output to results.xml.'
+RSpec::Core::RakeTask.new(:junit) do |t|
+  t.rspec_opts = %w[-r yarjuf -f JUnit -o results.xml]
+  t.pattern    = 'spec/'
+end