curtin dname udev rules files look odd (.rules.rules)

[Ryan Harper]

Here's what /etc/udev/rules.d looks like on a run with store config using dname
(ZestyTestRaid6Boot)

-rw-r--r-- 1 root root 176 Mar 28 14:24 fourth_disk-part1.rules.rules
-rw-r--r-- 1 root root 165 Mar 28 14:24 fourth_disk.rules.rules
-rw-r--r-- 1 root root 174 Mar 28 14:24 main_disk-part1.rules.rules
-rw-r--r-- 1 root root 174 Mar 28 14:24 main_disk-part2.rules.rules
-rw-r--r-- 1 root root 163 Mar 28 14:24 main_disk.rules.rules
-rw-r--r-- 1 root root 123 Mar 28 14:24 md0.rules.rules
-rw-r--r-- 1 root root 176 Mar 28 14:24 second_disk-part1.rules.rules
-rw-r--r-- 1 root root 165 Mar 28 14:24 second_disk.rules.rules
-rw-r--r-- 1 root root 175 Mar 28 14:24 third_disk-part1.rules.rules
-rw-r--r-- 1 root root 164 Mar 28 14:24 third_disk.rules.rules