Story 1840. Added a method to provide a list of formatted attributes in a String to be used by the ac admin tool.

Story 1840. Initial setup of this module with the command line framework. The 'List' command appears to work.

s1728: move WhoAmIServlet from ac_ws to cadcAccessControl-Server, put all servlets in the same package, fix unit tests.

Story 1657 rework. Added test cases for a subject with no principal and a subject with more than one principal.

Story 1657 rework. Updated based on Brian's review comments. Moved IdentityType to cadcUtil to consolidate its usage.

Story ac2. Deleted file with an incorrect lowercase file name. Identical file with JSONUser... already exists.