ECF API Refactoring

Prior to 1.0, ECF will be going through a concerted API and exemplary app refactoring effort. See below for list of desired refactorings and current state

API Refactorings

'Low-end' Execution Environment Support

See: https://bugs.eclipse.org/bugs/show_bug.cgi?id=149024

Problem: Dependency on javax.security.auth.callback.* classes. These classes are not available in Framework 1.1 (they are part of JAAS classes that are optional for F1.1)

Removed ECF core and all provider references to classes

  javax.security.auth.callback.Callback;
  javax.security.auth.callback.CallbackHandler;
  javax.security.auth.callback.NameCallback;
  javax.security.auth.callback.UnsupportedCallbackException;

FIX:

Added new classes and changed existing references to above classes to classes in ECF org.eclipse.ecf.core.security package:

  org.eclipse.ecf.core.security.Callback;
  org.eclipse.ecf.core.security.CallbackHandler;
  org.eclipse.ecf.core.security.NameCallback;
  org.eclipse.ecf.core.security.UnsupportedCallbackException;