Disable Rubocop Metrics/BlockLength for spec files

RSpec spec files can contain long blocks easily because
of the outher describe methods. So this rule makes not too much
sense for these files.

Author: peterfication

.rubocop.yml

@@ -6,3 +6,7 @@ AllCops:
     - 'vendor/**/*'
     - 'spec/fixtures/**/*'
     - 'tmp/**/*'
+
+Metrics/BlockLength:
+  Exclude:
+    - 'spec/**/*.rb'

spec/lib/annotate/annotate_models_spec.rb

@@ -5,7 +5,7 @@
 require 'active_support/core_ext/string'
 require 'files'
 
-describe AnnotateModels do # rubocop:disable Metrics/BlockLength
+describe AnnotateModels do
   def mock_index(name, params = {})
     double('IndexKeyDefinition',
            name:          name,

spec/lib/annotate/parser_spec.rb

@@ -1,7 +1,7 @@
 require_relative '../../spec_helper'
 
 module Annotate # rubocop:disable Metrics/ModuleLength
-  describe Parser do # rubocop:disable Metrics/BlockLength
+  describe Parser do
     before(:example) do
       ENV.clear
     end