karbor: specify cinder conf and karbor conf
karbor: specify cinder conf and karbor conf

[1] enable cinder multi-workers more than 2 for karbor fullstack
    parallel test
[2] Increase RPC response timeout
[3] Make the CI system use the specified conf, and System installed
using devstack use default conf.

Change-Id: Ic8a6dd9e81ec8b5496adf3908adcdbfed5c13f5c

openstack-infra/project-config,openstack-infra/project-config