Add CentOS 5.7 and 6.4.

Signed-off-by: Jerome Maloberti <jerome.maloberti@citrix.com>
Fix indentation.

Signed-off-by: Jerome Maloberti <jerome.maloberti@citrix.com>
Fixes for CentOS.

Signed-off-by: Jerome Maloberti <jerome.maloberti@citrix.com>