Fix the mix use of name and uuid in NetworksNegativeTestJSON

In NetworksNegativeTestJSON, tests will try to assert non exist id.
However, some of the tests assign the id with random name while some of
them assign with random uuid. We should keep them consistence and use
random uuid to avoid confusing people.

Change-Id: Ib29506da6ef3dd9798e2424f96aa4918ef48b9fb
Closes-bug: #1489393
1 file changed