lib/neutron: Fix conf handling
lib/neutron: Fix conf handling

- Remove extra spaces
- Fix a missing space in the generated option string
- Fix a fatal typo

Change-Id: Ieca1c3e3c7e2ff59089ef45435e126ce7ff4f9b5
Closes-Bug: #1667073

group-policy/devstack,group-policy/devstack,openstack-dev/devstack,dtroyer/devstack,richliu/devstack,dtroyer/devstack,nawawi/openstack,openstack-dev/devstack,richliu/devstack,noironetworks/devstack,noironetworks/devstack,nawawi/openstack