VIVO-761 Rework and move RequestedAction

Create AuthorizationRequest, and make RequestedAction a sub-class of it. Move the RequestActionConstants into RequestedAction. Move the class to a different package.
VIVO-761 Use RequestedAction instead of Actions

Modify VitroHttpServlet, similar classes, and all subclasses to use RequestedAction instead of Actions. Modify PolicyHelper also.
The pre-compile JSP script needs to be updated.