Revert "cbuildbot_config: temporarily mark 'auron-paladin' not important"

This reverts commit 01f6ee56a1b55576a4d047fcfbdb58d1f97f4273.

CL:427325 marked auron-paladin not important due to chromium:678643,
which is now fixed. Builds on auron-paladin have been passing in the
last 50 runs, so this CL marks auron-paladin as important again by
reverting CL:427325.

BUG=chromium:681267
TEST=`./cbuildbot/chromeos_config_unittest`

Change-Id: I0619b39d655cbe33f58276053ff76a0fdd2f5866
Reviewed-on: https://chromium-review.googlesource.com/430824
Commit-Ready: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Dan Shi <dshi@chromium.org>
2 files changed