Add 'state_path' and 'lock_path' for Neutron::Server

Closes-bug: #1384123

Change-Id: I8a0e703231c312b80c1749174f666242d1399ab5
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Merge "Add 'state_path' and 'lock_path' for Neutron::Server"