When a new PA is deployed with several role definitions, these roles still needs to be created by hand
before they can be assigned to a user.
As the required name of these roles (as derived from the web.xml) is predefined, I want to add the feature
to automatically create new RolePrincipals on deployment.
As initial implementation I'm going to use a new jetspeed-portlet.xml meta-data definition: <roles create="true"/>
to enable this feature.
Also, if nobody objects, I'd like to make this the default behavior once this works and then
<roles create="false"/> can be used to prevent it.