Recommend minimum necessary permissions for client.

[jmcarp]

• Recommend cloud_controller.global_auditor instead of more permissive admin or admin_read_only
• Drop --skip-ssl-validation; examples should default to secure flags

cc @wjwoodsoon

[shinji62]

Since which cf release global_auditor exist ?

[jmcarp]

@shinji62: looks like the global_auditor scope was introduced in https://github.com/cloudfoundry/capi-release/releases/tag/1.20.0 about a year ago. That was packaged with https://github.com/cloudfoundry/cf-release/releases/tag/v252.

[shinji62]

Got it. Thanks