fence_vmware_soap/fence_vmware_rest commands fail on one cluster node due to "http_proxy" environmental variable being set on that cluster node

Issue

• fence_vmware_soap/fence_vmware_rest commands fail with error "Unable to connect/login to fencing device" on one cluster node, while it is successful on the other cluster node
• "http_proxy" environmental variable is set on one of the cluster node, and "pcs cluster status" output shows below warnings on that cluster node

PCSD Status:
Warning: Proxy is set in environment variables, try disabling it
  Node01: Offline
Warning: Proxy is set in environment variables, try disabling it
  Node02: Offline