wake on lan task fail

Wake on LAN Tasks fail due to missing cobblerd apparmor rule for powerwake:

lsb_release -rd
Description: Ubuntu 12.04 LTS
Release: 12.04

Tue May 1 12:13:49 2012 - INFO | running: ['/bin/sh', '-c', u'if [ -x /sbin/ether-wake ]; then\n\t/sbin/ether-wake -i eth0 "08:00:27:79:15:b1"\nelif [ -x /usr/bin/powerwake ]; then\n\t/usr/bin/powerwake "08:00:27:79:15:b1"\nelif [ -x /usr/bin/wakeonlan ]; then\n\t/usr/bin/wakeonlan "08:00:27:79:15:b1"\nelif [ -x /usr/sbin/etherwake ]; then\n\t/usr/sbin/etherwake "08:00:27:79:15:b1"\nfi']
Tue May 1 12:13:49 2012 - INFO | received on stdout:
Tue May 1 12:13:49 2012 - DEBUG | received on stderr: /bin/sh: 4: /usr/bin/powerwake: Permission denied

Error reported in syslog:
May 1 12:13:57 maas kernel: [ 5692.851952] type=1400 audit(1335867237.867:35): apparmor="DENIED" operation="exec" parent=63
44 profile="/usr/bin/cobblerd" name="/usr/bin/powerwake" pid=6345 comm="sh" requested_mask="x" denied_mask="x" fsuid=0 ouid=
0

Please add the required permission
i.e. /usr/bin/powerwake rix,

to:

/etc/apparmor.d/usr.bin.cobblerd