veyron/services/mgmt/device/impl: minor clean up to ping args handling in test

Follow-up to go/vcl/1403.

Extract user name out of json-encoded suid helper args, and make PingArgs
comparable with DeepEqual.

Change-Id: Ie0e7f84a81314310f721b763126dba5b422f6a0b
1 file changed
tree: 03903de71c8ab3bbf5422b42f8e1007f491cc386
  1. lib/
  2. profiles/
  3. runtimes/
  4. security/
  5. services/
  6. tools/