Move (rename) backends functional tests backup and restore to preserve history

maudj

22.07.2009 b16d0a580bee5d3f081c36e0f4da7236dae81356

opends/tests/staf-tests/functional-tests/testcases/backends/backup.xml does not exist in tree e19f2742f0a6ff576087e5268311b72a772f097f