"require_server_version_higher_than '5.6.10'" ensures that the test is only run with xtrabackup_56 as the XtraBackup binary. If it wasn't the case, a lot of other tests would fail too. Thus checks for xtrabackup_56 (and thus, the function) are redundant, please remove them.
Vlad,
"require_ server_ version_ higher_ than '5.6.10'" ensures that the test is only run with xtrabackup_56 as the XtraBackup binary. If it wasn't the case, a lot of other tests would fail too. Thus checks for xtrabackup_56 (and thus, the function) are redundant, please remove them.