CD/DVD Mount point in FSTAB failure

Is there a better way to mount a removable optical disk on RHEL 7.2? I am required to have a CD/DVD mount at mnt/updates when inserted, However, if I add the mount point to FSTAB and don't have a cd/dvd inserted, the system fails to boot and I am dumped into emergency mode. CD/DVD's MUST mount at that location automatically, as the users will not be able to manually mount them.

When I used this entry in RHEL 5.11, it would fail to mount and then continue on with booting the OS, and mount the disk whenever inserted. Here, I can't seem to figure out how to have it boot successfully AND have CD/DVDs mount at /mnt/updates automatically when a disk is inserted.

The mount folders are there, and my FSTAB entry looks like:

/dev/sr0 /mnt/updates auto defaults,rw,user 0 0

Any suggestions?