Adding routes fail on Ubuntu Server

[ericswpark]

Expected behavior: OpenVPN connects and Internet works

Actual Behavior: OpenVPN connects but Internet does not work

Steps to Reproduce:

1. Connect with direct or SSL.
2. OpenVPN throws this warning (error?)

   Feb 22 21:11:21 vpn-passthrough openvpn[15745]: RTNETLINK answers: File exists
   Feb 22 21:11:21 vpn-passthrough ovpn-streisand-direct[15745]: ERROR: Linux route
   add command failed: external program exited with error status: 2
   Feb 22 21:11:21 vpn-passthrough ovpn-streisand-direct[15745]: /sbin/ip route add
   10.8.0.0/24 via 10.8.0.5

3. VPN connects, BUT Internet does not work. Confirmed by pinging 8.8.8.8.

streisand-diagnostics.md

### Ansible Information

* Ansible version: 2.6.5
* Ansible system: Linux
* Host OS: Ubuntu
* Host OS version:  18.04
* Python interpreter: python
* Python version: 2.7.15rc1

### Streisand Information

* Streisand Git revision: dc37b89d1c119e7c57d3812d109cb146ad508434
* Streisand Git clone has untracked changes: no
* Genesis role: genesis-digitalocean
* Custom SSH key: False

### Enabled Roles

* Shadowsocks enabled:  True
* Wireguard enabled: True
* OpenVPN enabled: True
* stunnel enabled: True
* Tor enabled: False
* Openconnect enabled: True
* TinyProxy enabled: True
* SSH forward user enabled: True
* Configured number of VPN clients: 5

[antmak]

VPN connects, BUT Internet does not work. Confirmed by pinging 8.8.8.8.

yes, the same

[JamesHagerman]

I believe this is due to a conflicting route in the *.opvn file. I reference a fix here: https://github.com/StreisandEffect/streisand/issues/1514#issuecomment-502395488

tl;dr: Comment out the offending route in the *.opvn file using a ; and try again.

I don't know enough about how openvpn usually adjusts routes when it's started, so I can't really dig much deeper.

It would be nice to fix this in Streisand's configs if possible though...