Use SecureRandom.uuid since ruby 2.x

Author: jsirex

.rubocop_todo.yml

@@ -488,14 +488,6 @@ Style/FileWrite:
     - 'lib/fog/core/cache.rb'
     - 'spec/core/cache_spec.rb'
 
-# Offense count: 1
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: format, sprintf, percent
-Style/FormatString:
-  Exclude:
-    - 'lib/fog/core/uuid.rb'
-
 # Offense count: 6
 # This cop supports safe autocorrection (--autocorrect).
 # Configuration parameters: EnforcedStyle, MaxUnannotatedPlaceholdersAllowed, AllowedMethods, AllowedPatterns.

lib/fog/core/uuid.rb

@@ -4,16 +4,10 @@ module Fog
   class UUID
     class << self
       def uuid
-        if supported?
-          SecureRandom.uuid
-        else
-          ary = SecureRandom.random_bytes(16).unpack("NnnnnN")
-          ary[2] = (ary[2] & 0x0fff) | 0x4000
-          ary[3] = (ary[3] & 0x3fff) | 0x8000
-          "%08x-%04x-%04x-%04x-%04x%08x" % ary
-        end
+        SecureRandom.uuid
       end
 
+      # :nodoc: This method is used by other plugins, so preserve it for the compatibility
       def supported?
         SecureRandom.respond_to?(:uuid)
       end