Add support for SubComponent in hostnaming for CDN/LB components

[roleyfoley]

Expected Behaviour

When configuring a Port on a LB host name component I can specify including SubComponent which will add the name of the Subcomponent into the hostname

Current Behaviour

Only the Component can be used at the moment which uses the part LB/CDN name. This can easily cause conflicts across multiple port hostnames.

Possible Solution

Add support for the SubComponent as an option when determining the hostname.

Context

Make it easier to have unique hostnames across components automatically