Suggested approach for ODL/SFC package install

opendaylight_config.yml

---
# Copyright 2017, Ericsson AB
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

- name: Set the packages to install
  set_fact:
    neutron_optional_combined_pip_packages: >-
      {%- set packages = neutron_optional_opendaylight_pip_packages %}
      {%- if 'networking_sfc.services.sfc.plugin.SfcPlugin' in neutron_plugin_base %}
      {%- set _ = packages.extend(neutron_sfc_opendaylight_pip_packages) %}
      {%- endif %}
      {{- packages }}

- name: Install OpenDaylight pip packages
  pip:
    name: "{{ neutron_optional_combined_pip_packages }}"
    state: "{{ neutron_pip_package_state }}"
    virtualenv: "{{ neutron_bin | dirname }}"
    virtualenv_site_packages: "no"
    extra_args: >-
      {{ neutron_developer_mode | ternary(pip_install_developer_constraints | default('--constraint /opt/developer-pip-constraints.txt'), '') }}
      {{ (pip_install_upper_constraints is defined) | ternary('--constraint ' + pip_install_upper_constraints | default(''),'') }}
      {{ pip_install_options | default('') }}
  register: install_packages
  until: install_packages|success
  retries: 5
  delay: 2
  tags:
    - opendaylight-install
    - opendaylight-pip-packages

- include: setup_ovs_opendaylight.yml
  when: neutron_services['neutron-server']['group'] not in group_names