JCR-3811 
 - Add a new ResettableTempFileInputStream that is capable of being reset to the beginning of the stream in order to allow re-reading 
 - Simplify TempFileInputStream to only be responsible for removing the temporary file when it is closed 
  


git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/branches/2.8@1626154 13f79535-47bb-0310-9956-ffa450edef68