v1.7.1 ssl issue

[xhu-cloudera]

Hi, Thanks for the package. I am working on a spark2 project that only runs on scala-2.11. I am trying to get skuber-1.7.1 to work. I encountered the following issue: Failed => java.net.ConnectException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

While it looks like the ssl cert issue. However, I am just trying to www.google.com as my host in the test. It should not have any ssl issue.

Any suggestions?