Fix: SSL Certificates not properly surfaced

[david-mclain]

Manual Testing

Verify Bug

• Download landscape client and place self signed server certificate in an unreadable directory by landscape
• Try to connect client to server using the following command
  landscape-config --account standalone --url https://<server-ip>/message-system --ping-url https://server-ip/ping -k ssl-cert-location
• Code should fail and provide no information as to why it fails

Verify Fix

• Repeat above steps but instead using this version
• Verify that warning message is provided by logs

[srunde3]

LGTM - I tested using a file path that didn't exist, and that also logged a warning message (as expected). 🚀