Description of problem:
When booting a CentOS 7 vm with cloud-init configured network cloud-init-local.service hangs when bringing up the configured interface and never finishes the rest of the user-data script. 

Version-Release number of selected component (if applicable):
0.7.x


How reproducible:
always

Steps to Reproduce:
1. Create a vm, install CentOS 7 add EPEL 7 beta repo. Install cloud-init.
2. Boot vm with static network configuration for eth0 and some random user-data script.
3. Log in to vm and run: systemctl status cloud-init-local.service

Actual results:
[root@localhost xxxxx]# systemctl status cloud-init-local.service
cloud-init-local.service - Initial cloud-init job (pre-networking)
   Loaded: loaded (/usr/lib/systemd/system/cloud-init-local.service; enabled)
   Active: activating (start) since fre 2014-08-01 22:50:34 CEST; 1min 2s ago
 Main PID: 897 (cloud-init)
   CGroup: /system.slice/cloud-init-local.service
           ├─ 897 /usr/bin/python /usr/bin/cloud-init init --local
           ├─1304 /bin/bash /etc/sysconfig/network-scripts/ifup-eth ifcfg-eth0
           └─2624 /usr/bin/python -Es /usr/bin/firewall-cmd --zone= --change-interface=eth0

aug 01 22:50:38 localhost.localdomain cloud-init[897]: [CLOUDINIT] util.py[DEBUG]: Writing to /etc/resolv.conf - wb: [420] 247 bytes
aug 01 22:50:38 localhost.localdomain cloud-init[897]: [CLOUDINIT] util.py[DEBUG]: Restoring selinux mode for /etc/resolv.conf (recursive=False)
aug 01 22:50:38 localhost.localdomain cloud-init[897]: [CLOUDINIT] util.py[DEBUG]: Restoring selinux mode for /etc/resolv.conf (recursive=False)
aug 01 22:50:38 localhost.localdomain cloud-init[897]: [CLOUDINIT] util.py[DEBUG]: Reading from /etc/sysconfig/network (quiet=False)
aug 01 22:50:38 localhost.localdomain cloud-init[897]: [CLOUDINIT] util.py[DEBUG]: Read 66 bytes from /etc/sysconfig/network
aug 01 22:50:38 localhost.localdomain cloud-init[897]: [CLOUDINIT] util.py[DEBUG]: Writing to /etc/sysconfig/network - wb: [420] 66 bytes
aug 01 22:50:38 localhost.localdomain cloud-init[897]: [CLOUDINIT] util.py[DEBUG]: Restoring selinux mode for /etc/sysconfig/network (recursive=False)
aug 01 22:50:38 localhost.localdomain cloud-init[897]: [CLOUDINIT] util.py[DEBUG]: Restoring selinux mode for /etc/sysconfig/network (recursive=False)
aug 01 22:50:38 localhost.localdomain cloud-init[897]: [CLOUDINIT] __init__.py[DEBUG]: Attempting to run bring up interface eth0 using command ['ifup', 'eth0']
aug 01 22:50:38 localhost.localdomain cloud-init[897]: [CLOUDINIT] util.py[DEBUG]: Running command ['ifup', 'eth0'] with allowed return codes [0] (shell=False, capture=True)

Expected results:
Something like this

cloud-init-local.service - Initial cloud-init job (pre-networking)
   Loaded: loaded (/usr/lib/systemd/system/cloud-init-local.service; disabled)
   Active: active (exited) since fre 2014-08-01 23:00:32 CEST; 6s ago
 Main PID: 897 (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/cloud-init-local.service

And vm booted with network interface configured and up, user-data script finished running.

Additional info:
With this SELinux policy loaded the vm boots as expected.

---
module local 1.0;

require {
        type NetworkManager_t;
        type cloud_init_t;
        type firewalld_t;
        class dbus send_msg;
}

#============= NetworkManager_t ==============
allow NetworkManager_t cloud_init_t:dbus send_msg;

#============= firewalld_t ==============
allow firewalld_t cloud_init_t:dbus send_msg;
---