Anaconda does not create fstab entry for swap volume on md raid

Issue

• We are observing the issue described in http://bugs.centos.org/view.php?id=8460
• After upgrading the installer to 7.1, anaconda does not create a fstab record for swap anymore if swap is on a md raid.
• Relevant kickstart config fragment:

ignoredisk --only-use=sda,sdb
zerombr
clearpart --all --drives=sda,sdb --initlabel

part raid.0001 --size=16384 --ondisk=sda
part raid.0002 --size=1 --grow --ondisk=sda

part raid.0101 --size=16384 --ondisk=sdb
part raid.0102 --size=1 --grow --ondisk=sdb

raid swap --level=1 --device=md0 raid.0001 raid.0101
raid / --level=1 --fstype ext4 --device=md1 raid.0002 raid.0102

The swap partition is created correctly, but there is no relevant record in fstab after installation.

If the swap partition is created directly on a disk, fstab record appears. Example kickstart section when everything is ok:

ignoredisk --only-use=vda
zerombr
clearpart --all --drives=vda --initlabel


part swap --size=2048 --ondisk=vda
part / --size 1 --grow --ondisk=vda