Validate SSL certificate against CA_BUNDLE path

It is better than to not validate at all:

for python-suds (fence_vmware_soap):

http://docs.python-requests.org/en/master/user/advanced/
requests.get('https://github.com', verify='/path/to/certfile')

change in:
line 61 -- transport=RequestsTransport(verify=verify)

---------
for gnutls (SSL clients):

change will be required in fencing.py:
function _open_ssl_connection(options):

Start by inspecting the python-suds fence_vmware_soap code around line 61, where RequestsTransport is created, and then read fencing.py and _open_ssl_connection(options) for the gnutls SSL-client path. The issue is done when both paths use the supplied CA_BUNDLE path for certificate validation rather than leaving verification disabled.

Written by the indexing model from the issue text.