Why are there security warnings when the ssl_insecure=1 option is used with fence_vmware_soap?

Issue

• Using fence_vmware_soap with the ssl_insecure=1 option, the following warnings can be seen in the logs.

  stonith-ng[1224]: warning: fence_vmware_soap[7777] stderr: [ /usr/lib/python2.7/site-packages/urllib3/connectionpool.py:769: InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.org/en/latest/security.html ]
  stonith-ng[1224]: warning: fence_vmware_soap[7777] stderr: [   InsecureRequestWarning) ]
  

• Running fence_vmware_soap from the command line with --ssl-insecure results in the following warning:

  /usr/lib/python2.7/site-packages/urllib3/connectionpool.py:852: InsecureRequestWarning: Unverified HTTPS request is being made. Adding certificate verification is strongly advised. See: https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings