Resolves issue with vmware_vswitch module for v2.0
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.
Playbook
```yaml
- name: Add a temporary vSwitch
local_action:
module: vmware_vswitch
hostname: "{{ inventory_hostname }}"
username: "{{ esxi_username }}"
password: "{{ site_passwd }}"
switch_name: temp_vswitch
nic_name: "{{ vss_vmnic }}"
mtu: 1500
```
Module Testing
```bash
TASK [Add a temporary vSwitch] *************************************************
task path: /opt/autodeploy/projects/emmet/tasks/deploy/esxi_network.yml:13
ESTABLISH LOCAL CONNECTION FOR USER: root
localhost EXEC ( umask 22 && mkdir -p "$( echo $HOME/.ansible/tmp/ansible-tmp-1454342817.37-180776062017566 )" && echo "$( echo $HOME/.ansible/tmp/ansible-tmp-1454342817.37-180776062017566 )" )
ESTABLISH LOCAL CONNECTION FOR USER: root
localhost EXEC ( umask 22 && mkdir -p "$( echo $HOME/.ansible/tmp/ansible-tmp-1454342817.41-201974997737598 )" && echo "$( echo $HOME/.ansible/tmp/ansible-tmp-1454342817.41-201974997737598 )" )
ESTABLISH LOCAL CONNECTION FOR USER: root
localhost EXEC ( umask 22 && mkdir -p "$( echo $HOME/.ansible/tmp/ansible-tmp-1454342817.44-148446986849801 )" && echo "$( echo $HOME/.ansible/tmp/ansible-tmp-1454342817.44-148446986849801 )" )
localhost PUT /tmp/tmpLLExSG TO /root/.ansible/tmp/ansible-tmp-1454342817.37-180776062017566/vmware_vswitch
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-1454342817.37-180776062017566/vmware_vswitch; rm -rf "/root/.ansible/tmp/ansible-tmp-1454342817.37-180776062017566/" > /dev/null 2>&1
localhost PUT /tmp/tmpyoAaHt TO /root/.ansible/tmp/ansible-tmp-1454342817.41-201974997737598/vmware_vswitch
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-1454342817.41-201974997737598/vmware_vswitch; rm -rf "/root/.ansible/tmp/ansible-tmp-1454342817.41-201974997737598/" > /dev/null 2>&1
localhost PUT /tmp/tmpPcmaMZ TO /root/.ansible/tmp/ansible-tmp-1454342817.44-148446986849801/vmware_vswitch
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-1454342817.44-148446986849801/vmware_vswitch; rm -rf "/root/.ansible/tmp/ansible-tmp-1454342817.44-148446986849801/" > /dev/null 2>&1
changed: [foundation-esxi-01 -> localhost] => {"changed": true, "invocation": {"module_args": {"hostname": "foundation-esxi-01", "mtu": 1500, "nic_name": "vmnic1", "number_of_ports": 128, "password": "VALUE_SPECIFIED_IN_NO_LOG_PARAMETER", "state": "present", "switch_name": "temp_vswitch", "username": "root"}, "module_name": "vmware_vswitch"}}
changed: [foundation-esxi-02 -> localhost] => {"changed": true, "invocation": {"module_args": {"hostname": "foundation-esxi-02", "mtu": 1500, "nic_name": "vmnic1", "number_of_ports": 128, "password": "VALUE_SPECIFIED_IN_NO_LOG_PARAMETER", "state": "present", "switch_name": "temp_vswitch", "username": "root"}, "module_name": "vmware_vswitch"}}
changed: [foundation-esxi-03 -> localhost] => {"changed": true, "invocation": {"module_args": {"hostname": "foundation-esxi-03", "mtu": 1500, "nic_name": "vmnic1", "number_of_ports": 128, "password": "VALUE_SPECIFIED_IN_NO_LOG_PARAMETER", "state": "present", "switch_name": "temp_vswitch", "username": "root"}, "module_name": "vmware_vswitch"}}
```
Documentation fix
e4d7af368b