Starting corosync automatically on boot fails with "parse error in config: No interfaces defined" in RHEL 7 Beta

Issue

• When corosync starts on boot, it fails with "No interfaces defined"
• corosync starts on boot before the network interfaces have fully started

Nov 14 12:17:57 node1 systemd: Started Network Manager Wait Online.
Nov 14 12:17:57 node1 systemd: Starting Network is Online.
Nov 14 12:17:57 node1 systemd: Reached target Network is Online.
Nov 14 12:17:57 node1 systemd: Starting Corosync Cluster Engine...
Nov 14 12:17:57 node1 corosync[797]: [MAIN  ] Corosync Cluster Engine ('2.3.2'): started and ready to provide service.
Nov 14 12:17:57 node1 corosync[797]: [MAIN  ] Corosync built-in features: dbus rdma systemd xmlconf snmp pie relro bindnow
Nov 14 12:17:57 node1 corosync[797]: [MAIN  ] parse error in config: No interfaces defined
Nov 14 12:17:57 node1 corosync[797]: [MAIN  ] Corosync Cluster Engine exiting with status 8 at main.c:1215.
Nov 14 12:17:57 node1 network: Bringing up loopback interface:  [  OK  ]