CentOS binary packages for Xena have moved Neutron's api-paste.ini file
to /etc/neutron [1]. Make this file available at the old location [2]
for compatiblity with kolla-ansible, until the configuration is modified
to use the new location.
[1] https://review.rdoproject.org/r/c/openstack/neutron-distgit/+/34845
[2] /usr/share/neutron/api-paste.ini
Change-Id: I2295884ef3b4c3bf4b087599322b0c5761e7b775
22def6336d