Remove unneeded neutron config parts from block-storage.yaml

Some of the keys defined in block-storage.yaml for neutron and
passed to the BlockStorage nodes were related to neutron, but
BlockStorage nodes do not route instances traffic so do not need
to be deployed with the OVS agent.

Change-Id: Icc7d5ea0d91370ccdf7cb4742d052fea004bae44
Merge "Remove unneeded neutron config parts from block-storage.yaml"