MT: Modify Share such that a single install configuration will restrict visibility of the types,aspects, properties, and actions to tenant's specific view

This relates to ALF-11855

Summary:

http://wiki.alfresco.com/wiki/Multi-Tenancy#Tenant_Customisation, indicates the usage of dynamic models for multitenant environments.

The deployment of the web-client-config-custom.xml can be dynamically deployed as well (http://wiki.alfresco.com/wiki/Dynamic_Models#Deploying_web_client_customisations) but this documentation does not cover the case of share UI which would use "shared-config-custom.xml".

The comment "reloadable Share config (if using dynamic models)" listed here:
http://wiki.alfresco.com/wiki/Multi-Tenancy#Not_Implemented, indicates dynamic deployment for MT is not implemented.

Only option suggested for controlling specific to Tenant MT visibility of aspects/types/actions is "since multiple Share instances can be configured against the same repository, is to have separate Share instances with their own share-config-custom configuration pointing to the same MT Alfresco instance."

Can this be modified so that visibility of types,aspects,properties are tenant specific in share? without having to do a separate install of share for each tenant to accomplish this?