Mode 2061.1

MODE 2061.1 - Added config option to FileSystemConnector "binaryKeyMode", accompanying unit tests, and test files

binaryKeyMode -  bookend | openssl | streaming (default)
  "bookend" - computes hash based on concat of first and last 1024 bytes of file
            -shortens time of large files 64GB from ~15 minutes to .004 seconds
  "openssl" - uses openssl CLI - maybe improve performance of ~1GB files from ~ 12sec to 6 sec
 "streaming" - (default) uses original modeshape SecureHash to compute hash