Bug 1050014 - Cannot deploy bundle to EAP domain mode

Well, I'm not sure if we should "codify" such things when the bundle subsystem as such doesn't understand them. 
Wouldn't the same be achievable through the "action" attribute of the `BundleHandoverFacet#handleContent()`?

Btw. how do you plan for the bundle handlers to actually do the handover? Will they have a reference to the facet implementation available somewhere that they will call directly or do you want to have another simple API exposed to the bundle handlers to which they will hand over the deployment?

What I mainly miss is some kind of workflow description of the phases. Do you plan to call the `handleContent()` method 3 times for the same deployment (i.e. in each phase)? Or do you envision the bundle handler to merely say to the `handleContent()` - I'm in the preinstall stage, do whatever you think might be appropriate with this deployment at this stage?