Currently placement-api is configured to log to
/var/log/kolla/placement/placement-api.log, but config.json is changing
permissions of /var/log/kolla/placement/placement.log - this patch
changes this.

Change-Id: I7f1591bdbc7c03302befc3ca6ebf1b13c95640c2

1. The Keystone WSGI scripts don't have a python3- prefix, although they
   are using python 3.

2. The Placement WSGI script doesn't have a python3- prefix, although it
   is using python 3.

Depends-On: https://review.openstack.org/651327
Change-Id: I805df8f85634edea8322495ca73897d44967cfe6
Closes-Bug: #1823989

RDO is packaging placement-api with bundled httpd config
and it conflicts with kolla-ansible generated one.

Change-Id: I018a4ed1b2282e8a789b63e3893e61db2fde8cf2

Depends-On: https://review.openstack.org/#/c/642958
Depends-On: https://review.openstack.org/642984
Change-Id: If795a9eb3ec92f75867ce3f755d6b832eba31af9