[Enhancement] [RHEL/6] mount_option_nodev_removable_partitions rule:
* Allow the OVAL check to PASS if the expected removable device doesn't
exist on the underlying system (default value of 'var_removable_partition'
variable is '/dev/cdrom'. But since there can exist systems without
/dev/cdrom | /dev/sr0 devices, the check shouldn't fail of the device
isn't present) -- IOW we should check 'nodev' option only in case specific
device truly exists on the system,
* Couple of other cosmetic changes for OVAL check (move id= always to be the
first attribute, version= the last one, align order of OVAL objects definitions
with order of OVAL tests definitions etc.)