Me too. I just hacked the params.pp to replace mysqldb with mariadb.. 

I also see problems with:

* iptables being disabled in favor of firewalld (the firewall rules are applied against iptables, but not read by firewalld and this means they are not persistant across reboots) - disable firewalld and enable iptables before doing packstack.

* sudoers restrictions being too tight for the quantum user to update dhcp records - edit /etc/sudoers.d/quantum to allow that user to execute all commands via sudo (not very secure I know...)

* selinux rules preventing random stuff - so I set selinux to permissive mode

* the systemd unit file for quantum-l3-agent is wrong -

sed -i '/^ExecStart/ { s#.*#ExecStart=/usr/bin/quantum-l3-agent --config-file /etc/quantum/quantum.conf --config-file /etc/quantum/l3_agent.ini --log-file /var/log/quantum/l3-agent.log# }' /usr/lib/systemd/system/quantum-l3-agent.service

I think this is also a problem:

* limits are wrong for the memcached configuration

I ran into more issues, but I didn't write them down and I've not had time to make a systematic check from a clean install.