Add skip TLS verification option to path config

[alexhung]

This allows skipping TLS connection verification with Artifactory.

[TJM]

I know its too late for feedback here, but IMO it is just about as easy to ensure that the Vault machine trusts the artifactory cert at the system level. In addition it is far more secure. :)

[alexhung]

@TJM Agree. This is a specific feature request from a customer who has their own set of reasons and requirements.