Support `html5-list` for service instance level destinations

[micellius]

Description

Current implementation of html5-plugin allows to list applications of app-host instances available via subaccount level destinations. It should be possible to list also applications of app-host instances available via service instance level destinations.

The proposed syntax for the command may be

cf html5-list -di <destination_service_instance_name>

Qualities of Change

• Functional - y
• User Interface - n
• Documentation - y
• Introduces new dependency (y/n) - n
• Incompatible change (y/n) - n