updated documentation in vmware_guest.py

[toxicvengeance]

SUMMARY

Added note regarding online disk resizing and changed wording of a few sentences. Also added vSphere 6.7 as "tested on" as it works very well and I use it on a daily basis for deploying and modifying virtual machines.

ISSUE TYPE

• Docs Pull Request

COMPONENT NAME

vmware_guest.py

ANSIBLE VERSION

ansible 2.6.4
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/root/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.12 (default, Dec  4 2017, 14:50:18) [GCC 5.4.0 20160609]

[ansibot]

cc @Akasurde @dav1x @nerzhul @pdellaert @warthog9
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[ansibot]

Hi @toxicvengeance,

Thank you for the pullrequest, just so you are aware we have a dedicated Working Group for vmware.
You can find other people interested in this in #ansible-vmware on Freenode IRC
For more information about communities, meetings and agendas see https://github.com/ansible/community

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[mscherer]

shipit

[samccann]

Thanks @toxicvengeance for helping to improve the Ansible documentation!