bigip changes as requested by bcoca and abadger:
bigip changes as requested by bcoca and abadger:

* Fix to error if validate_cert is True and python doesn't support it.
* Only globally disable certificate checking if really needed.  Use
  bigip verify parameter if available instead.
* Remove public disable certificate function to make it less likely
  people will attempt to reuse that

thaim/ansible,thaim/ansible