Fix unit test

Cherry-pick the changes introduced by
c73b54e50b62c489f04432bdbc5bee678b18226e, which adds the subnet_id
keyword to the constructor for the FakeIPAllocation class

Change-Id: I55c6ba1f20ec5ccd0eda3191addbb7b3a31ba734
QoS RPC texts: Fix typo for method name

Change-Id: If3ff7ab65ef524eefa9a8be9df82e5ef4fed4b05