remove unnecessary neutron files under neutron/tests
remove unnecessary neutron files under neutron/plugins
remove unnecessary neutron files under neutron/agent
remove unnecessary neutron files under neutron/{cmd, common}
remove unnecessary neutron files under neutron/services/
remove unnecessary neutron files under neutron/locale
remove unnecessary neutron files under neutron/debug
remove unnecessary neutron files under neutron/extensions
remove unnecessary files under neutron/scheduler
remove unnecessary files under neutron/db
remove unnecessary neutron files under neutron/api/rpc
remove unnecessary files under  neutron/notifiers
remove unnecessary neutron_plugin_base_v2.py quota.py
rename neutron/agent to tacker
rename neutron/openstack/ to tacker
rename neutron/tests to tacker/tests
rename neutron/db to tacker/db
rename neutron/locale to tacker/locale
rename neutron/common to tacker/common
rename neutron/api to tacker/api