missing dependencies on lockfile and kombu

Detail from changelog upstream:

* Add lockfile and kombu as requirements for keystone

Runtime error in log:

2014-03-13 21:05:32.874 5016 ERROR stevedore.extension [-] Could not load 'rabbit': No module named kombu
2014-03-13 21:05:32.874 5016 ERROR stevedore.extension [-] No module named kombu
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension Traceback (most recent call last):
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension File "/usr/lib/python2.7/dist-packages/stevedore/extension.py", line 162, in _load_plugins
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension verify_requirements,
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension File "/usr/lib/python2.7/dist-packages/stevedore/named.py", line 123, in _load_one_plugin
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension verify_requirements,
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension File "/usr/lib/python2.7/dist-packages/stevedore/extension.py", line 177, in _load_one_plugin
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension plugin = ep.load(require=verify_requirements)
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2048, in load
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension entry = __import__(self.module_name, globals(),globals(), ['__name__'])
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension File "/usr/lib/python2.7/dist-packages/oslo/messaging/_drivers/impl_rabbit.py", line 23, in <module>
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension import kombu
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension ImportError: No module named kombu
2014-03-13 21:05:32.874 5016 TRACE stevedore.extension
2014-03-13 21:05:32.877 5016 ERROR keystone.notifications [-] Failed to construct notifier
2014-03-13 21:05:32.877 5016 TRACE keystone.notifications Traceback (most recent call last):
2014-03-13 21:05:32.877 5016 TRACE keystone.notifications File "/usr/lib/python2.7/dist-packages/keystone/notifications.py", line 175, in _get_notifier
2014-03-13 21:05:32.877 5016 TRACE keystone.notifications transport = messaging.get_transport(CONF)
2014-03-13 21:05:32.877 5016 TRACE keystone.notifications File "/usr/lib/python2.7/dist-packages/oslo/messaging/transport.py", line 174, in get_transport
2014-03-13 21:05:32.877 5016 TRACE keystone.notifications raise DriverLoadFailure(url.transport, ex)
2014-03-13 21:05:32.877 5016 TRACE keystone.notifications DriverLoadFailure: Failed to load transport driver "rabbit": No 'oslo.messaging.drivers' driver found, looking for 'rabbit'
2014-03-13 21:05:32.877 5016 TRACE keystone.notifications

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: keystone 1:2014.1~b3-0ubuntu3
ProcVersionSignature: User Name 3.13.0-17.37-generic 3.13.6
Uname: Linux 3.13.0-17-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
Date: Fri Mar 14 11:37:33 2014
Ec2AMI: ami-0000003c
Ec2AMIManifest: FIXME
Ec2AvailabilityZone: serverstack-az-1
Ec2InstanceType: m1.small
Ec2Kernel: aki-00000002
Ec2Ramdisk: ari-00000002
PackageArchitecture: all
ProcEnviron:
 TERM=screen
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: keystone
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.keystone.default.catalog.templates: [deleted]
modified.conffile..etc.keystone.keystone.conf: [deleted]
modified.conffile..etc.keystone.keystone.paste.ini: [deleted]
modified.conffile..etc.keystone.logging.conf: [deleted]
modified.conffile..etc.keystone.policy.json: [deleted]