The cloudcontrol hosts in codfw are tripping the icinga "check systemd state"
```cloudcontrol2003-dev:~$ sudo systemctl --failed
UNIT LOAD ACTIVE SUB DESCRIPTION
● neutron-linuxbridge-agent.service loaded failed failed Openstack Neutron LinuxBridge Plugin Agent
```
```
Jan 02 14:15:18 cloudcontrol2001-dev systemd[1]: [/lib/systemd/system/neutron-linuxbridge-agent.service:12] Runtime directory is not valid, ignoring assignment: neutron lock/neutron
Jan 02 14:15:18 cloudcontrol2001-dev systemd[1]: [/lib/systemd/system/neutron-linuxbridge-agent.service:13] Unknown lvalue 'CacheDirectory' in section 'Service'
```
The unit configuration for that service looks a little strange:
```
cloudcontrol2001-dev:~$ sudo systemctl cat neutron-linuxbridge-agent [15/169]
# /lib/systemd/system/neutron-linuxbridge-agent.service
[Unit]
Description=Openstack Neutron LinuxBridge Plugin Agent
After=mysql.service postgresql.service rabbitmq-server.service keystone.service
[Service]
User=neutron
Group=neutron
Type=simple
WorkingDirectory=~
RuntimeDirectory=neutron lock/neutron
CacheDirectory=neutron
ExecStart=/etc/init.d/neutron-linuxbridge-agent systemd-start
Restart=on-failure
LimitNOFILE=65535
TimeoutStopSec=15
[Install]
WantedBy=multi-user.target
```
I'm not sure why that service is on these systems, it might be related to the upgrade work in T241348