vcenter-only: VN creation failed due to noneType received

[Sarath]

This is Sanity failure and regression as same tests passed on 3.1 latest and issue seen on 3.2 latest

On debugging, vcenter-plugin see the VN creation and api server not receive and below errors seen relevant,

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[2016-11-29 13:26:55,677] [INFO ] [Thread-3:VCenterEventHandler@45] [Process event dvPort group VN1 in c4k4u14 was added to switch c4k4u14_dvs.]
[2016-11-29 13:26:55,698] [INFO ] [Thread-3:VCenterDB@748] [Found <network VN1, dvs c4k4u14_dvs, datacenter c4k4u14, vCenter https://10.204.217.189/sdk>.]
[2016-11-29 13:26:55,718] [INFO ] [Thread-3:VCenterDB@777] [Found <dpg VN1, dvs c4k4u14_dvs, datacenter c4k4u14, vCenter https://10.204.217.189/sdk>.]
[2016-11-29 13:26:55,835] [INFO ] [Thread-3:VncDB@485] [Creating API VN <VN1, b52db56b-fd39-3a4f-86bf-c0c9c45f1df8>]
[2016-11-29 13:26:55,837] [INFO ] [Thread-3:ApiConnectorImpl@228] [>> Request: POST, /virtual-networks, {"virtual-network":{"port_security_enabled":false,"router_external":false,"is_shared":false,"external_ipam":false,"flood_unknown_unicast":false,"multi_policy_service_chains_enabled":false,"id_perms":{"enable":true,"user_visible":false,"creator":"vcenter-plugin"},"display_name":"VN1","network_ipam_refs":[{"to":["default-domain","vCenter","vCenter-ipam"],"attr":{"ipam_subnets":[{"subnet":{"ip_prefix":"10.1.1.0","ip_prefix_len":24},"subnet_uuid":"b478d9f5-b551-462b-9be7-198a5c233512","enable_dhcp":true,"allocation_pools":[{"start":"10.1.1.1","end":"10.1.1.254"}],"addr_from_start":true,"subnet_name":"VN1-subnet","alloc_unit":1}]},"href":null,"uuid":null}],"name":"VN1","uuid":"b52db56b-fd39-3a4f-86bf-c0c9c45f1df8","fq_name":["default-domain","vCenter","VN1"],"parent_type":"project"}}]
[2016-11-29 13:26:55,884] [INFO ] [Thread-3:ApiConnectorImpl@263] [<< Response Status: HTTP/1.1 500 Internal Server Error]
[2016-11-29 13:26:55,884] [ERROR] [Thread-3:ApiConnectorImpl@354] [create api request failed: Internal Server Error]
[2016-11-29 13:26:55,884] [ERROR] [Thread-3:ApiConnectorImpl@356] [Failure message: A str or unicode value was expected, but NoneType was received instead (None)]
[2016-11-29 13:26:55,885] [INFO ] [Thread-3:ApiConnectorImpl@231] [>> Request: GET, /virtual-network/b52db56b-fd39-3a4f-86bf-c0c9c45f1df8]
[2016-11-29 13:26:55,887] [INFO ] [Thread-3:ApiConnectorImpl@263] [<< Response Status: HTTP/1.1 404 Not Found]
[2016-11-29 13:26:55,887] [WARN ] [Thread-3:ApiConnectorImpl@415] [GET failed: Not Found]
[2016-11-29 13:26:55,895] [INFO ] [Thread-3:VCenterEventHandler@71] [Done processing event dvPort group VN1 in c4k4u14 was added to switch c4k4u14_dvs.]
[2016-11-29 13:26:55,903] [INFO ] [Thread-3:VCenterNotify@358] [Done processing property update, nothing changed]

[Sarath (nsarath)]

nsarath@ubuntu-build04:/auto/cores/1645609$ pwd
/auto/cores/1645609
nsarath@ubuntu-build04:/auto/cores/1645609$
nsarath@ubuntu-build04:/auto/cores/1645609$ ls -l
total 3263284
-rwxrwxrwx 1 nsarath test 1242634240 Nov 29 00:36 Ctrl-A-log.tar
-rwxrwxrwx 1 nsarath test 1072158720 Nov 29 00:35 Ctrl-B-log.tar
-rwxrwxrwx 1 nsarath test 1013688320 Nov 29 00:34 Ctrl-C-log.tar
nsarath@ubuntu-build04:/auto/cores/1645609$