Add --insecure option

[visola]

Description

curl has the following option to ignore SSL/TLS verification:

 -k, --insecure      Allow connections to SSL sites without certs (H)

Right now, there's no way to access insecure websites. It would also be good to add this option in the profile.

Acceptance Criteria

• There's an option -k, --insecure to ignore SSL/TLS validation from the CLI
• There's an option insecure: true on the profile and request levels
• Add tests for insecure connections