Remove Neutron MetaAPIProxy from cellsv2-layout
Remove Neutron MetaAPIProxy from cellsv2-layout

Its unclear which metadata service the section is refering to
and moreover none of them seem to need an api_database section.

Change-Id: I77f7a0f3a1e4a3702ca330cbe3f54b6a77bb77b0
Closes-Bug: #1785237

openstack/nova,mahak/nova,openstack/nova,mahak/nova,klmitch/nova,klmitch/nova,klmitch/nova,gooddata/openstack-nova,mahak/nova,rahulunair/nova,mikalstill/nova,rahulunair/nova,mikalstill/nova,gooddata/openstack-nova,openstack/nova,mikalstill/nova,klmitch/nova,gooddata/openstack-nova,gooddata/openstack-nova,rahulunair/nova