Use single nova-api worker per compute node
Use single nova-api worker per compute node

Then using nova-network with metadata,
we don't have to spawn so many (processors core
count based) api workers for compute nodes.

Closes-bug: #1377837

Change-Id: I5835a09451d1604f6323a5cb50bfb7babb9304a5
Signed-off-by: Bogdan Dobrelya <0b23cd1e586d5f091fecb3391314c2b9ec1fd641@mirantis.com>

huntxu/fuel-library,huntxu/fuel-library,eayunstack/fuel-library,zhaochao/fuel-library,zhaochao/fuel-library,stackforge/fuel-library,eayunstack/fuel-library,huntxu/fuel-library,stackforge/fuel-library,xarses/fuel-library,stackforge/fuel-library,xarses/fuel-library,huntxu/fuel-library,xarses/fuel-library,eayunstack/fuel-library,SmartInfrastructures/fuel-library-dev,xarses/fuel-library,huntxu/fuel-library,eayunstack/fuel-library,ddepaoli3/fuel-library-dev,Metaswitch/fuel-library,stackforge/fuel-library,eayunstack/fuel-library,ddepaoli3/fuel-library-dev,zhaochao/fuel-library,SmartInfrastructures/fuel-library-dev,Metaswitch/fuel-library,Metaswitch/fuel-library,SmartInfrastructures/fuel-library-dev,zhaochao/fuel-library,SmartInfrastructures/fuel-library-dev,ddepaoli3/fuel-library-dev,ddepaoli3/fuel-library-dev,Metaswitch/fuel-library,ddepaoli3/fuel-library-dev,zhaochao/fuel-library,SmartInfrastructures/fuel-library-dev