FELIX-3780 - allow DA to be configured through ConfigAdmin:

- missed a system property used to process preprocessed resources;
- refactored the single property into a configuration object to allow future
  extensions without an explosion of methods on DeploymentAdminImpl.



git-svn-id: https://svn.apache.org/repos/asf/felix/trunk@1589435 13f79535-47bb-0310-9956-ffa450edef68