Move all dependency related classes into inspec/dependencies

Signed-off-by: Steven Danna <steve@chef.io>

lib/inspec/dependencies/dependency_set.rb

@@ -1,9 +1,9 @@
 # encoding: utf-8
-require 'inspec/vendor_index'
-require 'inspec/resolver'
+require 'inspec/dependencies/vendor_index'
+require 'inspec/dependencies/resolver'
 
 module Inspec
-  class Dependencies
+  class DependencySet
     attr_reader :list, :vendor_path
 
     # initialize

lib/inspec/dependencies/resolver.rb

@@ -4,7 +4,7 @@
 require 'logger'
 require 'molinillo'
 require 'inspec/errors'
-require 'inspec/requirement'
+require 'inspec/dependencies/requirement'
 
 module Inspec
   class Resolver

lib/inspec/profile.rb

@@ -8,7 +8,7 @@ require 'inspec/polyfill'
 require 'inspec/fetcher'
 require 'inspec/source_reader'
 require 'inspec/metadata'
-require 'inspec/dependencies'
+require 'inspec/dependencies/dependency_set'
 
 module Inspec
   class Profile # rubocop:disable Metrics/ClassLength
@@ -298,7 +298,7 @@ module Inspec
 
     def load_dependencies
       cwd = File.directory?(@target) ? @target : nil
-      res = Inspec::Dependencies.new(cwd, nil)
+      res = Inspec::DependencySet.new(cwd, nil)
       res.vendor(metadata.dependencies)
       res
     end