When this module was written back in May 2015 we were using 1.9.x. Being lazy I added to param the objects that the other functions would need. What I have noticed is in 2.0 exit_json is trying to jsonify those complex objects and failing. This PR resolves that issue with the vmware_dvs_portgroup module.
@kamsz reported this issue in https://github.com/ansible/ansible-modules-extras/pull/1568
Playbook
```
- name: Create Management portgroup
local_action:
module: vmware_dvs_portgroup
hostname: "{{ mgmt_ip_address }}"
username: "{{ vcsa_user }}"
password: "{{ vcsa_pass }}"
portgroup_name: Management
switch_name: dvSwitch
vlan_id: "{{ hostvars[groups['foundation_esxi'][0]].mgmt_vlan_id }}"
num_ports: 120
portgroup_type: earlyBinding
state: present
```
Module Testing
```
TASK [Create Management portgroup] *********************************************
task path: /opt/autodeploy/projects/emmet/tasks/deploy/dvs_network.yml:17
ESTABLISH LOCAL CONNECTION FOR USER: root
localhost EXEC ( umask 22 && mkdir -p "$( echo $HOME/.ansible/tmp/ansible-tmp-1454693809.13-142252676354410 )" && echo "$( echo $HOME/.ansible/tmp/ansible-tmp-1454693809.13-142252676354410 )" )
localhost PUT /tmp/tmpeQ8M1U TO /root/.ansible/tmp/ansible-tmp-1454693809.13-142252676354410/vmware_dvs_portgroup
localhost EXEC LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 LC_MESSAGES=en_US.UTF-8 /usr/bin/python /root/.ansible/tmp/ansible-tmp-1454693809.13-142252676354410/vmware_dvs_portgroup; rm -rf "/root/.ansible/tmp/ansible-tmp-1454693809.13-142252676354410/" > /dev/null 2>&1
changed: [foundation-vcsa -> localhost] => {"changed": true, "invocation": {"module_args": {"hostname": "172.27.0.100", "num_ports": 120, "password": "VALUE_SPECIFIED_IN_NO_LOG_PARAMETER", "portgroup_name": "Management", "portgroup_type": "earlyBinding", "state": "present", "switch_name": "dvSwitch", "username": "root", "vlan_id": 2700}, "module_name": "vmware_dvs_portgroup"}, "result": "None"}
```
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