Reassin hostname aliases nfs-ics, etc. to rfd1-infra and use them to mount shares

In /etc/fstab, we are mounting /software, etc. using new file server's hostname rfd1-infra. This was necessary during transition. Now that the transition to the new file server is complete, we should reassign hostname aliases nfs-ics, etc. to rfd1-infra and use those aliases to mount shares.