Cant not collect network delete notification

[li jian]

Ceilometer can not collect network delete notification
The root cause of that bug is Ceilometer does not collect network delete event as the message of network deldete is different with others.

[li jian (blacker1981)]

the meesage of create network is:
'payload': {u'network': {u'admin_state_up': True,
                          u'id': u'cac50684-0ce7-42f9-ba6c-e6ab9e43582e',
                          u'name': u'net4',
                          u'router:external': False,
                          u'shared': False,
                          u'status': u'ACTIVE',
                          u'subnets': [],
                          u'tenant_id': u'392880bb4a034911a1d295589df4bdbe'}},

delete network message is:
 'payload': {u'network_id': u'cac50684-0ce7-42f9-ba6c-e6ab9e43582e'},

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/114741

[OpenStack Infra (hudson-openstack)]

Change abandoned by gordon chung (<email address hidden>) on branch: master
Review: https://review.openstack.org/114741
Reason: spring cleaning... please reopen if you need this.