This class is responsible for managing whether a wizard is shown to the user
when a new internal composite application project is to be created, as well
as what UI panels are used within the wizard.
An SPI that a component project type can implement to validate all the
instances of that project type in a composite application project.
For example, if BPEL Project System wants to do validation across multiple
BPEL projects, it can implement this interface and put it in the BPEL
project's lookup.