Bug #1820007 documents failures to find /dev/disk/by-id/ symlinks
associated with encrypted volumes both in real world and CI
environments. These failures appear to be due to udev on these slow or
overloaded hosts failing to populate the required /dev/disk/by-id/
symlinks in time after the iSCSI volume has been connected.
This change seeks to avoid such failures by simply decorating
_get_device_link with the @utils.retry to hopefully allow udev time to
create the required symlinks under /dev/disk/by-id/.
Closes-Bug: #1820007
Change-Id: Ib9c8ebae7a6051e18538920139fecd123682a474
(cherry picked from commit 331316827a)
d8ed21e7d2