Support configuring Amp task file properties with CopySpec

[vierbergenlars]

At this moment file properties of the Amp task are configured like for example:

task amp(type: Amp) {
   moduleProperties = project.file("src/main/amp/module.properties")
   config = project.file("src/main/amp/config")
}

The current way of configuring makes it impossible to change CopySpec properties to match an other layout. I am not able to change the structure of the config directory on disk and map it to the right structure as it should be in the amp.

I would like to be able to use an alternative configuration layout where I can avoid creating the intermediate directory structure alfresco/modules/$moduleId for my amp.

For example, I place my module-context.xml file directly in src/main/amp/config and copy it in the amp to config/alfresco/modules/$moduleId/module-context.xml while expanding placeholders.

task amp(type: Amp) {
   config {
       from "src/main/amp/config"
       into "alfresco/modules/${moduleId}"
       expand [ "moduleId": moduleId ]
   }
}