Fix common snapshot script
Fix common snapshot script

(cherry picked from commit 8d54dc278be8d9b86a53f068103cece1d643c2f9)

uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend,uroni/urbackup_backend