robocopy fix for exit code of 2

Sometimes you want to use robocopy from nant, a sql job or another build tool, robocopy will return 2 during a successful run, this gets interpreted as an error, a google search on the issue returned this article Fixing Robocopy for SQL Server Jobs.

Robocopy is now installed by default on Windows7 and Windows Server 2008
http://technet.microsoft.com/en-us/library/cc733145(WS.10).aspx

here is robocopy_fix.bat based on the code in the "Fixing Robocopy for SQL Server Jobs" article