0.4.1 git20180424 systemd generic board fixes

Created by: RobertCNelson

@StrawsonDesign these 3 patches fix a few systemd issues when a non-"roboticape" board is loaded:

Before:

rootfs: clean, 82122/959616 files, 498914/3888512 blocks
[FAILED] Failed to start roboticscape.
See 'systemctl status roboticscape.service' for details.
[  OK  ] Started LSB: Start busybox udhcpd at boot time.

debian@beaglebone:~$ systemctl status
● beaglebone
    State: degraded
     Jobs: 0 queued
   Failed: 2 units
    Since: Tue 2018-04-24 19:03:26 UTC; 28s ago
   CGroup: /
           ├─user.slice

After:

debian@beaglebone:~$ systemctl status
● beaglebone
    State: running
     Jobs: 0 queued
   Failed: 0 units
    Since: Tue 2018-04-24 19:01:35 UTC; 29s ago
   CGroup: /
           ├─user.slice

Regards,