Use pbr for installing Ironic wsgi script

[Anton Arefiev]

Instead of copying wsgi application py file to wsgi server, ironic should create mod_wsgi reference
to wsgi script.

The pbr has `wsgi_scripts`[1] group which builds a base script that will run under mod_wsgi. It's created via the python install process.

[1] https://github.com/openstack/deb-python-pbr/blob/77d9ab7d07feb38281531deeeb4399017b5735d0/pbr/packaging.py#L342

[Vladyslav Drok (vdrok)]

Example here - https://review.openstack.org/241550

[Vladyslav Drok (vdrok)]

This is being handled here https://review.openstack.org/507011

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/507011
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=61b81d0c735f7d4ccbde4f4c818e4a7320ea544a
Submitter: Zuul
Branch: master

commit 61b81d0c735f7d4ccbde4f4c818e4a7320ea544a
Author: Vasyl Saienko <email address hidden>
Date: Mon Sep 25 10:44:09 2017 +0300

    Add uWSGI support

    This patch implements uWSGI support for ironic API service.
    ironic/api/app.wsgi is deprecated in favor of pbr generated
    ironic-api-wsgi

    Co-Authored-By: anascko <email address hidden>

    Change-Id: Ieb68c1042e31b77f9a549fd90afe31a65008deca
    Closes-Bug: #1719260
    Closes-Bug: #1668966

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/ironic 10.0.0 release.