The security configuration, JAXB mappings, and test script for KRA
have been updated to run properly.

The realm authentication on certificate request REST services has
been enabled. Since now in the CLI the authentication is done using
a separate login operation, it is now possible to POST the approval
data without the problem related to chunked message.

Ticket #300

A REST account service has been added to allow client to login
to establish a session and to logout to destroy the session. This
way multiple operations can be executed using the same session
without having to re-authenticate.

Ticket #357

Previously in PKIRealm the authentication token was stored in a thread
local variable. This does not work for multiple operations executed
using the same session because each operation may be handled by
different threads. A new PKIPrincipal has been added to store the
authentication token so that the threads can get the correct token
for the session.

Ticket #357

The code in PKIClient has been refactored into PKIConnection
such that a single connection object can be used by several
REST clients. The PKIClient will remain the base class for
all REST clients.

Ticket #357

1. Reorder http.conf to actually read worker config
2. Change functions so that the TPS would restart.  Before restarts
   would fail because the tus link already exists
3. Modify system verification test to return correctly when tests
   are successful

The GetCookie servlet has been refactored to use the new
SecurityDomainProcessor.

Ticket #309