Add rubocop-rspec

Almost all cops are starting as disabled until we can fix their
violations.

.rubocop.yml

+require: rubocop-rspec
+
 AllCops:
   TargetRubyVersion: 2.1
   # Cop names are not displayed in offense messages by default. Change behavior
@@ -1071,3 +1073,51 @@ Rails/TimeZone:
 # Use validates :attribute, hash of validations.
 Rails/Validation:
   Enabled: false
+
+##################### RSpec ##################################
+
+RSpec/AnyInstance:
+  Enabled: false
+
+RSpec/DescribeClass:
+  Enabled: false
+
+RSpec/DescribeMethod:
+  Enabled: false
+
+RSpec/DescribedClass:
+  Enabled: false
+
+RSpec/ExampleLength:
+  Enabled: false
+  Max: 5
+
+RSpec/ExampleWording:
+  Enabled: false
+  CustomTransform:
+    be: is
+    have: has
+    not: does not
+  IgnoredWords: []
+
+RSpec/FilePath:
+  Enabled: false
+  CustomTransform:
+    RuboCop: rubocop
+    RSpec: rspec
+
+RSpec/Focus:
+  Enabled: true
+
+RSpec/InstanceVariable:
+  Enabled: false
+
+RSpec/MultipleDescribes:
+  Enabled: false
+
+RSpec/NotToNot:
+  EnforcedStyle: not_to
+  Enabled: false
+
+RSpec/VerifiedDoubles:
+  Enabled: false

Gemfile

@@ -294,6 +294,7 @@ group :development, :test do
   gem 'spring-commands-teaspoon', '~> 0.0.2'
 
   gem 'rubocop', '~> 0.40.0', require: false
+  gem 'rubocop-rspec', '~> 1.5.0', require: false
   gem 'scss_lint', '~> 0.47.0', require: false
   gem 'coveralls', '~> 0.8.2', require: false
   gem 'simplecov', '~> 0.11.0', require: false

Gemfile.lock

@@ -692,6 +692,8 @@ GEM
       rainbow (>= 1.99.1, < 3.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (~> 1.0, >= 1.0.1)
+    rubocop-rspec (1.5.0)
+      rubocop (>= 0.40.0)
     ruby-fogbugz (0.2.1)
       crack (~> 0.4)
     ruby-progressbar (1.8.1)
@@ -1016,6 +1018,7 @@ DEPENDENCIES
   rspec-rails (~> 3.4.0)
   rspec-retry
   rubocop (~> 0.40.0)
+  rubocop-rspec (~> 1.5.0)
   ruby-fogbugz (~> 0.2.1)
   sanitize (~> 2.0)
   sass-rails (~> 5.0.0)

lib/tasks/rubocop.rake

 unless Rails.env.production?
   require 'rubocop/rake_task'
+
   RuboCop::RakeTask.new
 end