autotest: Change "displayName" to "name" in device registration tests

To match the current state of GCD spec.

BUG=brillo:778
TEST=`test_that -b link --fast 100.96.48.244 e:buffet_.*`
CQ-DEPEND=CL:264577

Change-Id: Ib93267bf3554d07fc26e23cd7f081c1bf105ff38
Reviewed-on: https://chromium-review.googlesource.com/264751
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
1 file changed