[core] updated UUID to use it's own UUID implementation if one was not available from the ruby lib.

lib/fog/core/uuid.rb

@@ -8,14 +8,16 @@ module Fog
         if supported?
           SecureRandom.uuid
         else
-          raise "UUID generation is not supported by your ruby implementation. Please try upgrading to Ruby 1.9.x."
+          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
       end
 
       def supported?
         SecureRandom.respond_to?(:uuid)
       end
-
     end
   end
 end

tests/core/uuid_tests.rb

@@ -4,13 +4,7 @@ Shindo.tests('Fog::UUID', 'core') do
     Fog::UUID.supported? == SecureRandom.respond_to?(:uuid)
   end
 
-  if Fog::UUID.supported?
-    tests('success').succeeds do
-      Fog::UUID.uuid =~ /[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}/
-    end
-  else
-    tests('success').succeeds do
-      raises(RuntimeError) { Fog::UUID.uuid }
-    end
+  tests('success').succeeds do
+    Fog::UUID.uuid =~ /[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}/
   end
 end