Description of problem:
When disabling network manager, if there were no 'DEVICE' options defined in the /etc/sysconfig/network-scripts/ifcfg-ethX files, the network fails to start 

Version-Release number of selected component (if applicable):
# cat /etc/redhat-release 
CentOS Linux release 7.2.1511 (Core) 

# rpm -qf /etc/sysconfig/network-scripts/ifup-eth
initscripts-9.49.30-1.el7.x86_64


How reproducible:
Get a CentOS 7.2 basic installation (I used virt-builder centos-7.2), disable NetworkManager, and run 'service network restart'

Steps to Reproduce:
1.
2.
3.

Actual results:
It fails complaining that the 'device' does not seem to be present

Expected results:
It should work correctly

Additional info:
Apr 27 10:46:18 lago_basic_suite_master_host0 systemd[1]: Stopping LSB: Bring up/down networking...
-- Subject: Unit network.service has begun shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit network.service has begun shutting down.
Apr 27 10:46:18 lago_basic_suite_master_host0 network[2403]: Shutting down interface eth0:  ERROR    : [ipv6_test_device_status] Missing parameter 'device' (arg 1)
Apr 27 10:46:18 lago_basic_suite_master_host0 ipv6_test_device_status[2444]: Missing parameter 'device' (arg 1)
Apr 27 10:46:18 lago_basic_suite_master_host0 network[2403]: [  OK  ]
Apr 27 10:46:18 lago_basic_suite_master_host0 network[2403]: Shutting down loopback interface:  [  OK  ]
Apr 27 10:46:18 lago_basic_suite_master_host0 systemd[1]: Starting LSB: Bring up/down networking...
-- Subject: Unit network.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit network.service has begun starting up.
Apr 27 10:46:18 lago_basic_suite_master_host0 network[2549]: Bringing up loopback interface:  [  OK  ]
Apr 27 10:46:18 lago_basic_suite_master_host0 network[2549]: Bringing up interface eth0:  ERROR    : [/etc/sysconfig/network-scripts/ifup-eth] Device  does not seem to be present, delaying initialization.
Apr 27 10:46:18 lago_basic_suite_master_host0 /etc/sysconfig/network-scripts/ifup-eth[2671]: Device  does not seem to be present, delaying initialization.
Apr 27 10:46:18 lago_basic_suite_master_host0 network[2549]: [FAILED]
Apr 27 10:46:18 lago_basic_suite_master_host0 systemd[1]: network.service: control process exited, code=exited status=1
Apr 27 10:46:18 lago_basic_suite_master_host0 systemd[1]: Failed to start LSB: Bring up/down networking.
-- Subject: Unit network.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit network.service has failed.
-- 
-- The result is failed.
Apr 27 10:46:18 lago_basic_suite_master_host0 systemd[1]: Unit network.service entered failed state.
Apr 27 10:46:18 lago_basic_suite_master_host0 systemd[1]: network.service failed.


The /etc/sysconfig/network-scripts/ifcfg-eth0 file that gets generated by dracut:

# Generated by dracut initrd
NAME="eth0"
ONBOOT=yes
NETBOOT=yes
UUID="b26dbb85-536c-4a01-86fc-57bb01cca298"
IPV6INIT=yes
BOOTPROTO=dhcp
TYPE=Ethernet
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
PEERDNS=yes
PEERROUTES=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes