Remove the unnecessary "openstack-neutron-lbaas" from neutron-server

since openstack-neutron-lbaas has beed installed in neutron-base image,
it's no need to install it again install neutron-server.

Change-Id: I5219b1d37a408dfeb61fa54133e36751af1ee389

docker/neutron/neutron-server/Dockerfile.j2

@@ -9,7 +9,6 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
     {% if base_distro in ['centos', 'oraclelinux', 'rhel'] %}
 
         {% set neutron_server_packages = [
-            'openstack-neutron-lbaas',
             'openstack-neutron-vpnaas'
         ] %}