neutron: Remove vmware-nsx and networking-mlx from binary

Those plugins have been already removed from source images, this
change removes them from binary.

Change-Id: If21a21296489c1f243bb46f2595ff94d999bd686

contrib/neutron-plugins/README.rst

@@ -3,7 +3,10 @@ contrib/neutron-plugins directory
 
 This directory contains example plugin definitions for neutron-base, to
 be included in the kolla-build.conf (ini file with kolla-build
-configuration).
+configuration) when using source type builds.
+
+In case of binary builds - please see template_override j2 files.
+
 Please read the main Kolla documentation on plugins for details.
 These should work simply by pasting them into the config file.
 You may want to adjust the filename to match the branch you are

contrib/neutron-plugins/template_override-networking-mlnx.j2

@@ -0,0 +1,4 @@
+{% extends parent_template %}
+
+# Neutron networking-mlnx plugin
+{% set neutron_base_packages_append = ['python3-networking-mlnx'] %}

contrib/neutron-plugins/template_override-vmware-nsx.j2

@@ -0,0 +1,4 @@
+{% extends parent_template %}
+
+# Neutron vmware-nsx plugin
+{% set neutron_base_packages_append = ['python3-networking-vmware-nsx'] %}

docker/neutron/neutron-base/Dockerfile.j2

@@ -22,9 +22,7 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
             'openstack-neutron-ml2',
             'openvswitch',
             'python3-networking-baremetal',
-            'python3-networking-mlnx',
             'python3-networking-sfc',
-            'python3-networking-vmware-nsx',
             'python3-openvswitch',
             'python3-oslo-vmware'
         ] %}
@@ -40,7 +38,6 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
             'neutron-plugin-ml2',
             'neutron-server',
             'openvswitch-switch',
-            'python3-networking-mlnx',
             'python3-networking-sfc',
             'python3-openvswitch',
             'python3-oslo.vmware'

releasenotes/notes/wallaby-neutron-plugins-excluded-b72220a2ea8c1a40.yaml

@@ -1,7 +1,7 @@
 ---
 upgrade:
   - |
-      Three Neutron plugins are no longer provided by default in source
+      Three Neutron plugins are no longer provided by default in
       images:
       ``networking-ansible``, ``networking-mlnx`` and ``vmware-nsx``.
       The main reason is that they lag in synchronising with OpenStack
@@ -10,5 +10,4 @@ upgrade:
       directory.
       Please read the included ``README.rst`` in case you depend on
       them.
-      Please note they are no longer included in published source
-      images.
+      Please note they are no longer included in published images.